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What Went Wrong: the third conditional for a business post-mortem

A B2 Business English lesson plan on the third conditional for lessons learned after a promotion backfires.

Grammar
The third conditional (If we had tested it, we would have seen the problems.), mixed conditionals (…we wouldn't be reading bad reviews now) and 'd as had or would.
Topic
A post-mortem on a summer promotion in the cafés of a fictional Portland coffee roaster, with words such as backfire, root cause, cut corners and in hindsight.
Activities
A post-mortem report to read, a blame-free review to hear, self-checking drills, a chat with a café manager and a wheel, then a lessons-learned section to write and a story to record.

What's inside

  1. Chapter 1Warm-up: Hindsight Is 20/20

    • PictureUnlock
    • Open a box and discussOpen the boxUnlock
    • Study the vocabulary: when things go wrongVocabularyTry it
    • Match the phrases to the situationsMatchUnlock

  2. Chapter 2Reading: The Iced Summer Report

    • Read the report: Iced Summer, what went wrongArticleUnlock
    • True or false? Read the report againTrue or falseUnlock
    • Choose the correct answer: the reportQuizUnlock

  3. Chapter 3Listening: No Blame, Just Lessons

    • Listen to Claire and SamListeningTry it
    • Transcript, for the teacherUnlock
    • Choose the correct answer: Claire and SamQuizUnlock

  4. Chapter 4Grammar: If We Had Known…

    • Study the scheme: third and mixed conditionalsGrammar schemeTry it
    • Choose the correct option: third or mixed conditionalChoose the optionUnlock
    • Fill in the gaps: put the verbs in the correct formFill in the gapsTry it
    • Fill in the table: third or mixed conditional?Fill in the tableUnlock
    • Choose the correct answer: what does it mean?QuizUnlock

  5. Chapter 5Speaking: Learning the Hard Way

    • Choose the best replyChatTry it
    • Spin the wheel and discussSpin the wheelUnlock

  6. Chapter 6Homework: Lessons Learned

    • Choose the correct option: third or mixed?Choose the optionUnlock
    • Find the matching pairs: phrases and meaningsMemory gameUnlock
    • Write a post-mortem: the lessons learnedWriting, checked by the teacherUnlock
    • Record your story: the decision that changed thingsSpeaking, checked by the teacherUnlock

21 exercises in 6 chapters. Start a 7-day free trial to open all of them, copy any part into your own lessons, and teach the lesson live.

Vocabulary

10 words and phrases from the lesson, each with a picture and audio in edio.

+7 more with pictures and audio in the lessonMore words

  • eat into profits
  • a bottleneck
  • cut corners
  • a root cause
  • the blame game
  • run a pilot
  • pay full price

Grammar: third and mixed conditionals

A post-mortem keeps asking one question: what if we had done it differently? Learners answer it with the third conditional for a past that didn't happen, link past mistakes to the present with mixed conditionals, and let the time of the result decide between the two, all in language that blames no one.

Third and mixed conditionals

Imagine a different past, and how it would change the past or the present

Third conditional: if + had, would have

The if-clause takes had + past participle, and the result would, could or might have + past participle: If the posters had gone up on time, more customers might have known about the offer. Would is sure, could possible, might maybe.

If + had + past participlewould / could / might + have + past participle

If we had tested the offer in one café, we would have seen the problems.

If the posters had gone up on time, more customers might have known about the offer.

We wouldn't have run out of ice if operations had known earlier.

Mixed conditionals: past meets present

A past condition can have a result now: If we had trained the baristas, we wouldn't be reading bad reviews now. And a present fact can explain a past result: If Sam weren't such an optimist, he'd have asked more questions. He still is one.

Mixed: past condition → present result

If + had + past participlewould / could / might + base form

If we had trained the baristas, we wouldn't be reading bad reviews now.

If Sam hadn't rushed the plan, he wouldn't feel so embarrassed today.

Mixed: present condition → past result

If + past simplewould / could / might + have + past participle

If we were better at planning, we would have ordered more cups. (We aren't good at it.)

If Sam weren't such an optimist, he'd have asked more questions. (He is an optimist.)

Third or mixed? Check the time of the result

When the condition is past, the if-clause is always had + past participle. The result's time decides the rest: in July or in the first week takes would have + past participle, while now, today or still take would + base form.

Third or mixed? Look at the time of the result

The result is in the past: third

  • If we had ordered more ice, we wouldn't have run out in the first week.
  • If the registers had been updated, the lines would have been shorter during the offer.

The result is true now: mixed

  • If we had tested the offer, we wouldn't be having this post-mortem now.
  • If the registers had been updated, our August figures would look better today.

Time words decide

When the condition is in the past, the if-clause is always If + had + past participle. Then look at the time of the result: with now, today or still, use would + base form (mixed); with a past time, such as in July or in the first week, use would have + past participle (third).

'd: had or would?

If we'd known about the registers, we'd have moved the launch has two different contractions. Before a past participle, 'd is had; before have or a base form, it's would: we'd be in a better position now.

'd + …It meansExample
'd + past participlehadIf we'd known about the registers, …
'd + have + past participlewould… we'd have moved the launch.
'd + base formwould… we'd be in a better position now.

Common mistakes, and a fair tone

Keep would out of the if-clause (If we had tested it, not If we would have tested it), and write had known, not had knew, and would have, never would of. In a review, If we had planned it better… sounds fair; If you had… sounds like blame.

Typical mistakes

  • If we would have tested it, we would have seen the problems.

    If we had tested it, we would have seen the problems.

    No would in the if-clause: use had + past participle.

  • If I had knew about the registers, I'd have moved the launch.

    If I had known about the registers, I'd have moved the launch.

    had + past participle: known, not knew.

  • We would of ordered more cups.

    We would have ordered more cups.

    would've sounds like "would of", but always write have.

  • If we tested it in July, we would have found the problems.

    If we had tested it in July, we would have found the problems.

    An imagined past action needs the past perfect, not the past simple.

Also remember

  • would have = we're sure; could have = it was possible; might have = maybe: We might have made a profit.
  • The if-clause can come second, with no comma: We wouldn't have run out if operations had known earlier.
  • In formal English, use were for every person: If Sam were more careful, … In speech, was is common too.
  • In a post-mortem, say we, not you: If we had planned it better, … sounds fair; If you had… sounds like blame.

More lessons on this grammar: Third and mixed conditionals lessons and exercises

Try the third and mixed conditionals exercises

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What's in the lesson

  • 10 auto-checked exercises
  • 3 games
  • 2 teacher-checked tasks
  • 1 article
  • 1 grammar scheme
  • 1 set of word cards
  • 1 audio clip
  • 1 picture
  • 1 transcript

The main objectives of this lesson are to:

  • imagine a different past with the third conditional: If we had tested the offer in one café first, we would have found most of these problems.
  • join a past mistake to a result now with a mixed conditional: If we'd trained the baristas properly, those reviews wouldn't be there now.
  • say how sure you are with would, could or might have, and read 'd as had or would: If we'd offered a smaller discount, we might have made money.
  • write the lessons-learned section of a post-mortem without blame: what went wrong, the root cause and what will change, with we, not you

Lesson 17 opens Looking back and ahead, the final unit of Business English B2 · A Year at Wrenfield, a course set at a fictional coffee roaster in Portland, Oregon; this unit reviews what went wrong and plans what comes next. The lesson takes the first and second conditionals of lesson 8 into the past and reuses the could have of lesson 16, and lesson 18 moves on to deductions about the past. A post-mortem suits the third conditional well, since every lesson learned starts as If we had…

Discussion boxes about projects that went off plan come first; then ten word cards with pictures and audio, from a post-mortem to pay full price, are matched to short situations. Sam's report on a summer offer for iced drinks lists five things that went wrong, from registers that weren't updated to posters that came late, and names time as the root cause. In the AI-voiced listening, the CEO goes through it with him, without blame. Four exercises after the scheme check themselves, among them a table that rewrites real events as an imagined past.

In the chat, students play Sam and answer a café manager who is nervous about next summer, and a wheel adds role-plays, opinions and a chain game of if-clauses. For homework, a choice drill and a memory game check themselves; a lessons-learned section and a recorded story about a decision that changed things go to the teacher.

Grammar:
third conditional · mixed conditionals · 'd = had or would
Topic:
post-mortems · lessons learned · promotions

Teaching tips

  • Turn the report's problems into sentence pairs: one student reads a fact, such as The posters went up late, and a partner rewrites it as If the posters had gone up on time, …
  • Before the listening, ask who should take the blame for the failed offer. Afterwards, ask what the CEO says before anything else, and how that changes the meeting.
  • Run a sticky-note review of a real project with an in-company group: everyone writes one If we had… note, and the group sorts them into past results and results that are still true now.
  • With one-to-one clients, start from a real decision, such as a job they took or turned down: ask what would have happened otherwise and how their work would be different now.

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The whole course: Business English B2 · A Year at Wrenfield

20 lessons at B2 in American English that follow a year at Wrenfield Coffee Roasters in Portland, Oregon, as founder Claire Morgan and her team win a Dutch hotel contract. Learners network, write emails, run meetings, negotiate, handle complaints and present figures, with one grammar point per lesson.See the course

  1. Unit 1 First contacts

    networking, a company story, a business lunch and emails: present tenses, the present perfect, question tags, indirect questions

    1. Lesson 1Making ContactsPresent simple and present continuous at work
    2. Lesson 2Our Story: From Cart to RoasteryPresent perfect and past simple for company history
    3. Lesson 3The Business LunchQuestion tags and short answers
    4. Lesson 4Emails That Get AnswersIndirect questions and polite requests

  2. Unit 2 Meetings and figures

    scheduling, sales figures, running a meeting and negotiating: future forms, trends, gerunds and infinitives, conditionals

    1. Lesson 5Setting Up MeetingsFuture forms for meetings and schedules
    2. Lesson 6The Monthly FiguresDescribing trends
    3. Lesson 7Running a MeetingGerunds and infinitives in meetings
    4. Lesson 8Negotiating a DealFirst and second conditionals in a negotiation

  3. Unit 3 Problems and growth

    a complaint, a late shipment, a launch and hiring: the present perfect continuous, the passive, comparatives, relative clauses

    1. Lesson 9Handling a ComplaintPresent perfect simple vs continuous
    2. Lesson 10The Late ShipmentThe passive in all tenses
    3. Lesson 11Launching a ProductComparatives and superlatives with modifiers
    4. Lesson 12Hiring the Right PersonDefining and non-defining relative clauses

  4. Unit 4 Reports, prices and feedback

    reporting back, explaining prices, expenses and feedback: reported speech, linking words, modals of obligation, past modals

    1. Lesson 13Reporting BackSay vs tell in reported speech
    2. Lesson 14Explaining PricesLinking words of contrast, cause and result
    3. Lesson 15Travel and Expenses: Can I Claim That?Modals of obligation, prohibition and permission
    4. Lesson 16Giving FeedbackShould have, could have and didn't need to

  5. Unit 5 Looking back and ahead

    what went wrong, other cultures, an agency and next year: the third and mixed conditionals, past deduction, the causative, the future perfect

    1. Lesson 17 · you're hereWhat Went WrongThird and mixed conditionals
    2. Lesson 18Working Across CulturesModals of deduction, present and past
    3. Lesson 19Working with an AgencyCausative have and get
    4. Lesson 20The Road AheadFuture continuous and future perfect

Questions about this lesson

How do you know whether to use the third or a mixed conditional?
Look at when the result happens: a past result takes the third conditional, and a result that's true now takes a mixed one. If we had ordered more ice, we wouldn't have run out in the first week is about the past. If we had tested the offer, we wouldn't be having this post-mortem now is about today. Words such as now, today and still signal the mixed form.
How do you talk about lessons learned in English?
Lessons learned usually pair a different past with a plan for next time: If we had tested the offer in one café first, we would have found most of these problems in a few days. Next summer, we will run a pilot. Name the root cause rather than a person, and say we. What Went Wrong, a B2 Business English lesson on edio.ai, ends with a lessons-learned section for students to write.
How do you explain what went wrong on a project?
Explain what went wrong in order: the facts, the causes, then the root cause. The posters went up late, so many customers didn't know about the offer. The root cause was time. Keep it shared and factual (We made these decisions together) and close with what you would change: In hindsight, if we had tested it first, we would have found these problems.
Is it "if I had knew" or "if I had known"?
It's if I had known, with the past participle: If I had known about the registers, I would have moved the launch. After had, always use the participle: had known, had gone, had run, never had knew or had went. And keep would out of the if-clause: If I would have known is wrong too. In speech, it's usually If I'd known…
Is it "would have" or "would of"?
Always write would have; would of is a spelling mistake. In fast speech, would've sounds like would of, which is where the error comes from: We would have ordered more cups, not We would of ordered. The same goes for could have and might have. The chat in What Went Wrong on edio.ai slips would of into a wrong reply for learners to catch.
Does "'d" mean "had" or "would"?
It depends on the word that follows: 'd + a past participle is had, and 'd + have or a base form is would. In If we'd known, we'd have moved the launch, the first is had and the second would. In We'd be in a better position now, it's would again. A quiz in the B2 lesson What Went Wrong on edio.ai asks learners to decode both.
What is a post-mortem in business?
In business, a post-mortem is a meeting or report that reviews a finished project, often one that went wrong. It sets out what happened, what went wrong, the root cause and what will change: Next summer, we will run a pilot in one café first. A good one stays out of the blame game. It's also spelled postmortem; in medicine, the word means an examination after death.
What does "in hindsight" mean?
In hindsight means looking back now, knowing what you didn't know then. It often opens a third conditional: In hindsight, if the registers had been updated, the lines would have been shorter. With hindsight means the same. The saying Hindsight is 20/20 makes a similar point: after the event, everything looks clearer than it did at the time.
How do you keep a review meeting free of blame?
Share the responsibility first, then talk about decisions, not people: Before we start, this isn't about blame. I approved it too. Say we rather than you (If we had planned it better…, not If you had…), look for the root cause and end with changes everyone agrees on. In What Went Wrong on edio.ai, students hear a CEO and her marketing manager review a failed offer this way.
How do I teach conditionals about the past to business English learners?
Start from a real project that went wrong: learners list the facts, then rewrite each one as an imagined past, so The posters went up late becomes If the posters had gone up on time, more customers would have known. Then add results that are still true now for the mixed form. A review role-play with one rule, we instead of you, keeps the language fair.
What's good homework for practicing conditionals about the past?
A strong task is the lessons-learned part of a post-mortem about a project from the learner's own work, with at least two third conditionals and one mixed: If we had…, we wouldn't be… now. In the B2 lesson What Went Wrong on edio.ai, a choice drill and a memory game check themselves first; that written section and a recorded story about a decision that changed things go to the teacher.
Are there interactive exercises for conditionals about the past?
Yes: gap-fills where learners type each verb form show at once whether had, would have or would fits. Without an account, this page plays three parts of What Went Wrong, a B2 Business English lesson on edio.ai: a blame-free review of a summer offer, a gap-fill with third and mixed conditionals, and a chat answering a café manager's worries. The other exercises are locked.
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