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 telephone y'all'
'when I get habitation'

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 get out when it stops raining. (not when it will end)
  • When you are in London again, come and see united states. (not When you lot will be)
  • (said to a kid) What do you want to be when you lot grow up? (not volition grow)

То же самое происходит и после while / earlier / after / as presently as / until или till:

  • I'm going to read a lot while I'k on holiday. (not while I will be)
  • I'll probably get back home on Sunday. Earlier I go, I'd like to visit the museum.
  • Await here until (or till) I come dorsum.

B

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

  • Tin I infringe that book when you've finished with it?
  • Don't say annihilation while Ian is here. Wait 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 nowadays perfect, если два действия происходят в одно и то же время:

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

Часто можно использовать как present simple, так и present perfect:

I'll come as soon equally I end.

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

You'll feel better after you take something to eat.

You'll feel better after yous've had something to swallow.

C

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

  • It's raining hard. We'll get moisture if we go out. (not if we will go)
  • I'll be angry if information technology happens again. (not if information technology will happen)
  • Bustle up! If nosotros don't hurry, nosotros'll be late.

D

Сравните when и if:

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

  • I'k going shopping after. (for sure)When I go shopping, I'll buy some food.

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

  • I might become shopping later. (it'due south possible)If I go shopping, I'll buy some nutrient.
  • If it is raining this evening, I won't go out. (non When it is raining)
  • Don't worry if I'm late tonight. (not when I'm late)
  • If they don't come soon, I'yard not going to wait. (not When they don't come up)

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 (telephone) you when I (get) home from work.
  2. I want to see Julia before she (go) out.
  3. We're going on holiday tomorrow. I (tell) you all about it when we (come) dorsum.
  4. Brian looks very different now. When you (see) him again, you (non / recognise) him.
  5. (you / be) alone without me while I (be) away?
  6. We must do something presently earlier it (be) besides late.
  7. I don't desire to go without you. I (wait) until you (exist) set up.
  8. Sue has practical for the job, but she isn't very well-qualified for it. I (exist) surprised if she (get) it.
  9. I hope to play tennis tomorrow if the weather (exist) prissy.
  10. I'm going out now. If anybody (phone) while I (exist) out, can y'all take a message?

Key

2. Сделайте одно предложение из двух.

  1. It volition finish raining soon. Then we'll leave.
  2. I'll find somewhere to live. And then I'll give you my address.
  3. I'll do the shopping. Then I'll come directly dorsum habitation.
  4. It'southward going to become dark. Let's go home before that.
  5. She must apologise to me kickoff. I won't speak to her until then.

Key

three. Прочитайте ситуации и закончите предложения.

  1. A friend of yours is going on holiday. Y'all desire to know what she is going to do.
    Yous enquire: What are you lot going to do when ?
  2. A friend of yours is visiting you. She has to go soon but maybe there's time for some more than java.
    You ask: Would you similar some more coffee before ?
  3. You lot want to sell your car. Jim is interested in buying it, but he hasn't decided yet.
    You ask: Can you lot let me know every bit before long equally ?
  4. Your friends are going to New York before long. You lot desire to know where they're going to stay.
    You ask: Where are you going to stay when ?
  5. The traffic is very bad in your boondocks, but they are building a new route at the moment.
    You say: I think things will be improve when they .

Key

four. Выберите when или if.

Key

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