Page 259 - Oxford_English_Grammar_Course_Basic_2015

if: position; unless

An //-clause can come at the beginning or end of a sentence. When it comes first, it is often separated by a comma (,).

If I have time, I'll clean up the garden. I'll clean up the garden if I have time.

^ Use if to put these sentences together in two ways.
► Joe works at Brown's. He probably knows Annie.

if J o t w ortes a t ^xgyvvdz, he proba b ly _teipows Ayyyclt.

Jo t probably leiA,ows Avcvut I f be wortesat Browi/y's.
1 I can't sleep. I get up and read.

2 You take books from my room. Please tell me.

3 You're hungry. Why don't you cook some soup?

4 She's been travelling all day. She must be tired

5 We catch the first train. We can be in London by 9.00.

We can use unless to mean 'if... not', 'except if'.
You can't come in unless you have a ticket. (= 'You can't come in if you don't have a ticket.')
Unless I'm very tired, I go to bed about midnight. (= 'Except if I'm very tired ...')

^ Rewrite these sentences with unless.

► Children can't go in if they are not with an adult.
cMlLdctw oaiA/t 00 Iia, u.i/vless tbey are w ltb auv adu.lt.
► If you don't give me my money, I'm going to the police.

unless. you. give wee wty wLowey, tbe police.

1 You can't park here if you don't live in this street.

2 If you are not over 15, you can't see this film.

3 I don't drive fast except if I'm really late.

4 If I'm not going fishing, I get up late on Sundays.

5 We usually go for a walk after supper if there isn't a good film on TV.

6 I see my mother at weekends if I'm not travelling.

7 If it's not raining, I play tennis most evenings.

8 I can't help you if you don't tell me the truth.

244 IF