Mệnh đề WHEN - IF
Ở mệnh đề when / while / before / after / as soon as / until/ till không dùng
will kể cả thời gian của câu nói về tương lai⇒ I'll phone you
when I get home⇒
When you are in London again, come and see us.⇒ What are you going to do
while I'm away?.Có thể dùng Hiện tại hoàn thành ở mệnh đề when / while / before / after / as soon as / until/ till nếu nó kết thúc trước hành động khác (2 việc không kết thúc cùng nhau)
⇒ When I've phoned Kate, we can have dinner. (First I'll phone Kate and after that we can have dinner)
Không dùng hiện tại hoàn thành khi 2 việc xảy ra cùng nhau ⇒ When I phone Kate, I'll ask her about the party (not When I've phoned)
Thường mệnh để
when ... dùng thay nhau được present simple và present perfectI'll come as soon as I finish. ⇒ I'll come as soon as I've finished.
You'll feel better after you have or something to eat. ⇒ You'll feel better after you've had something to eat.
Nếu sự việc chắc chắn xảy ra thì dùng
WHEN nếu chỉ là khả năng dùng IF⇒ If it is raining this evening, I won't go out.
⇒ If they don't come soon, I'm not going to wait.
⇒ I might go out later. If I go out, I'll get some bread.
WHEN / IF
CÂU 1
Complete the sentences using the verbs in brackets.
All the sentences are about the future.
Use will/won't or the present simple (I see / he plays / it is etc.).
1 When (you / be) in London again, come and see us.
2 I want to see Sophie before (she / go) out.
3 Call me when (you / know) what time you're going to get here.
4 I'm going out now.
(you / be) here when (I /get) back?
5 I think everything will be fine,
but if (there / be) any problems, (I / call) you, OK?
6 We must do something soon before (it / be) too late.
7 Anna looks very different now.
When (you / see) ```you see`` her again,
```you will not recognise`` (you / not / recognise) her.
8 Steve has applied for the job, but he isn't really qualified for it.
(I / be) surprised if (he / get) it.
9 I'm going to be away for a few days.
If ```you need`` (you / need) to contact me
while (I / be) away, here's my mobile number.
10 I don't want to go without you. ```I will wait``(I / wait) for you
until (you / be) ready.
2 I want to see Sophie before (she / go) out.
3 Call me when (you / know) what time you're going to get here.
4 I'm going out now.
(you / be) here when (I /get) back?
5 I think everything will be fine,
but if (there / be) any problems, (I / call) you, OK?
6 We must do something soon before (it / be) too late.
7 Anna looks very different now.
When (you / see) ```you see`` her again,
```you will not recognise`` (you / not / recognise) her.
8 Steve has applied for the job, but he isn't really qualified for it.
(I / be) surprised if (he / get) it.
9 I'm going to be away for a few days.
If ```you need`` (you / need) to contact me
while (I / be) away, here's my mobile number.
10 I don't want to go without you. ```I will wait``(I / wait) for you
until (you / be) ready.
CÂU 2
Make one sentence from two.
1 It will stop raining soon. Then we'll go out.
when .
2 I'll find somewhere to live. Then I'll give you my address.
I when .
3 I'll do the shopping. Then I'll come straight back home.
after .
4 It's going to get dark. Let's go home before that.
before .
5 She must apologise to me first. I won't speak to her until then.
until .
when .
2 I'll find somewhere to live. Then I'll give you my address.
I when .
3 I'll do the shopping. Then I'll come straight back home.
after .
4 It's going to get dark. Let's go home before that.
before .
5 She must apologise to me first. I won't speak to her until then.
until .
CÂU 3
Put in when or if.
1 Don't worry I'm late tonight.
2 Be careful. You'll hurt yourself you fall.
3 I'm going to Rome next week. I'm there, I hope to visit a friend of mine.
4 I'm going shopping. you want anything, I can get it for you.
5 I don't see you tomorrow, when will I see you again?
6 I'm going away for a few days. I'll call you I get back.
7 I hope Sarah can come to the party. It will be a shame she can't come.
8 We can eat at home or, you prefer, we can go to a restaurant.
Nhấn F5 hoặc nếu muốn làm bài khác.
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