When (I do / I've done). Условные предложения с when и if

A

Изучите следующую ситуацию:

Предложение 'I'll telephone you when I get home' состоит из двух частей:


и

главная часть:
часть с when :

'I'll phone you lot'
'when I get home'

Время в предложении - будущее ('tomorrow'), но мы используем настоящее время (I get) в части предложения с when.

Мы не используем will в части предложения с when.

Еще немного примеров:

  • We'll go out when it stops raining. (not when it will finish)
  • When you are in London again, come and see the states. (not When you will be)
  • (said to a child) What do you want to be when you grow up? (not will grow)

То же самое происходит и после while / before / afterwards / every bit before long as / until или till:

  • I'm going to read a lot while I'yard on holiday. (non while I volition be)
  • I'll probably become dorsum home on Sunday. Before I go, I'd like to visit the museum.
  • Await here until (or till) I come back.

B

Вы также можете использовать nowadays perfect (have done) после when / after / until / as soon as:

  • Can I borrow that book when yous've finished with it?
  • Don't say anything while Ian is here. Await until he has gone.

Если вы используете present perfect, одно действие должно быть завершено перед другим (так, что два действия не происходят в одно и то же время):

  • When I've phoned Kate, we can have dinner.
    (= Сначала я позвоню Кате, и только потом мы можем начать обедать.)

Не используйте present perfect, если два действия происходят в одно и то же время:

  • When I telephone Kate, I'll enquire her about the party. (not When I've phoned)

Часто можно использовать как nowadays uncomplicated, так и present perfect:

I'll come equally soon as I cease.

I'll come up as soon every bit I've finished.

You'll experience improve after you accept something to eat.

Y'all'll feel better after you've had something to eat.

C

После if, для будущего мы обычно используем present unproblematic (if I practise / if I meet и др.):

  • It'south raining hard. Nosotros'll get wet if we go out. (not if we volition get)
  • I'll be aroused if information technology happens again. (non if it will happen)
  • Bustle upward! If we don't hurry, we'll be tardily.

D

Сравните when и if:

Мы используем when, говоря о чем-то, что несомненно случится:

  • I'm going shopping subsequently. (for sure)When I become shopping, I'll purchase some food.

Мы используем if (не when), говоря о том, что возможно случится:

  • I might go shopping afterward. (it's possible)If I go shopping, I'll purchase some food.
  • If it is raining this evening, I won't go out. (not When it is raining)
  • Don't worry if I'm tardily tonight. (not when I'thousand late)
  • If they don't come soon, I'thou not going to await. (non When they don't come)

Упражнения

1. Закончите предложения, используя глаголы в скобках. Все предложения о будущем. Используйте will/won't или present elementary (I see / he plays / it is и др.).

  1. I (phone) y'all when I (get) dwelling house from piece of work.
  2. I want to encounter Julia before she (get) out.
  3. We're going on holiday tomorrow. I (tell) yous all almost it when we (come) back.
  4. Brian looks very dissimilar now. When you (see) him again, y'all (not / recognise) him.
  5. (y'all / be) lonely without me while I (be) away?
  6. Nosotros must practice something soon before it (exist) too late.
  7. I don't want to go without you. I (wait) until you (be) ready.
  8. Sue has applied for the job, but she isn't very well-qualified for information technology. I (be) surprised if she (go) it.
  9. I hope to play tennis tomorrow if the conditions (be) nice.
  10. I'thousand going out now. If anybody (phone) while I (be) out, can you lot take a message?

Key

2. Сделайте одно предложение из двух.

  1. It will stop raining presently. And so we'll become out.
  2. I'll discover somewhere to alive. And so I'll give you lot my accost.
  3. I'll practice the shopping. Then I'll come straight back habitation.
  4. It's going to go dark. Allow'due south go home earlier that.
  5. She must apologise to me start. I won't speak to her until then.

Key

3. Прочитайте ситуации и закончите предложения.

  1. A friend of yours is going on holiday. You want to know what she is going to do.
    Y'all enquire: What are you lot going to exercise when ?
  2. A friend of yours is visiting you. She has to go soon but possibly there's fourth dimension for some more coffee.
    Yous enquire: Would y'all like some more coffee before ?
  3. You want to sell your car. Jim is interested in buying it, but he hasn't decided yet.
    You ask: Tin you allow me know as before long as ?
  4. Your friends are going to New York before long. Y'all want to know where they're going to stay.
    You lot enquire: Where are you going to stay when ?
  5. The traffic is very bad in your boondocks, simply they are edifice a new route at the moment.
    You lot say: I recollect things will be better when they .

Key

four. Выберите when или if.

Key

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