1. You will hurt your teeth if you
2. Do not watch the horror film if you
3. If there
4. If our flight is on time, we
5. What will you buy if you
6. If she gets up late, she
7. Unless it
8. I
9. I won't go unless he
10. —Can we play football in the playground, Mr Li?
—No, unless you
11. We will be late unless we
12. The little boy
eat
(eat) too much candy.2. Do not watch the horror film if you
get
(get) scared easily.3. If there
are
(be) fewer trees, there will be
(be) more pollution.4. If our flight is on time, we
will arrive
(arrive) in Beijing at 10 a.m.5. What will you buy if you
have
(have) a lot of money?6. If she gets up late, she
won't catch
(not catch) the early bus.7. Unless it
rains
(rain), we are going on a picnic this Saturday.8. I
won't lend
(not lend) the book to you unless you return it to me on time.9. I won't go unless he
comes
(come) to invite me himself.10. —Can we play football in the playground, Mr Li?
—No, unless you
finish
(finish) your homework first.11. We will be late unless we
leave
(leave) now.12. The little boy
won't stop
(not stop) crying unless you give him what he wants.答案：1. eat
2. get
3. are; will be
4. will arrive
5. have
6. won't catch
7. rains
8. won't lend
9. comes
10. finish
11. leave
12. won't stop
2. get
3. are; will be
4. will arrive
5. have
6. won't catch
7. rains
8. won't lend
9. comes
10. finish
11. leave
12. won't stop
二、根据要求改写下列句子
1. You cannot speak English. It's hard to travel in England. (用if连接两个句子)
2. Millie gets home late. Millie will miss her favourite TV programme. (用if 连接两个句子)
3. will, if, a, you, football, like, are, you, this, fan, game (.) (连词成句)
4. If you practise hard, you will improve your skills. (用unless改写为同义句)
5. Don't touch the instruments unless the teacher allows you to. (用if ... not改写为同义句)
6. Mary can't see clearly if she doesn't wear glasses. (用unless改写为同义句)
1. You cannot speak English. It's hard to travel in England. (用if连接两个句子)
If you cannot speak English, it's hard to travel in England.
2. Millie gets home late. Millie will miss her favourite TV programme. (用if 连接两个句子)
Millie will miss her favourite TV programme if she gets home late.
3. will, if, a, you, football, like, are, you, this, fan, game (.) (连词成句)
You will like this game if you are a football fan.
4. If you practise hard, you will improve your skills. (用unless改写为同义句)
You will not improve your skills unless you practise hard.
5. Don't touch the instruments unless the teacher allows you to. (用if ... not改写为同义句)
Don't touch the instruments if the teacher doesn't allow you to.
6. Mary can't see clearly if she doesn't wear glasses. (用unless改写为同义句)
Mary can't see clearly unless she wears glasses.
答案：1. If you cannot speak English, it's hard to travel in England.
2. Millie will miss her favourite TV programme if she gets home late.
3. You will like this game if you are a football fan.
4. You will not improve your skills unless you practise hard.
5. Don't touch the instruments if the teacher doesn't allow you to.
6. Mary can't see clearly unless she wears glasses.
2. Millie will miss her favourite TV programme if she gets home late.
3. You will like this game if you are a football fan.
4. You will not improve your skills unless you practise hard.
5. Don't touch the instruments if the teacher doesn't allow you to.
6. Mary can't see clearly unless she wears glasses.