13. use a construction with have to in place of the words. rewrite
1 it will be necessary for him to try harder if he wants to win the prize.
2 it has been necessary for them to save hard to buy their new hi-fi.
3 because of the snow she has been finding it necessary to walk to college.
4 it had already been necessary for us to clear the office floor there before the boss asked us to clear it again.
5 it would have been necessary for me to pay twice as much to travel first class.
6 we are finding it necessary to cut back on staff because of a shortage of orders.

14. supply mustn't or needn't / don't have to/haven't got to.
1 you
work such long hours. you won't earn any more.
2 they
wear a uniform. it's not obligatory.
3 she
leave the office last. she can go when she's ready.
4 you really
waste money like that. it worries your parents.
5
enter the laboratories without permission.
6 we
always wear protective clothing in the factory.
7 you
go to the party if you don't want to. nobody's forcing you.
8 не
do the job today, as long as it gets done some time this week.
9 surely we
leave home yet. it's far too early to go to the station.
10 passengers
smoke in the toilets.
11 'are you going to read the report? ' - "no, i
it's confidential.'
12 'are you going to read the report? - 'no, i
i already know what it says.
13 you
attend the meeting tomorrow. it's for union officials only.
14 you
attend the meeting tomorrow. it's not important.
15 you
forget to pay the electricity bill, or we'll be cut off.
16 we
worry about tom. he's just phoned to say he's all right.
15. supply needn't have or didn't have to and the correct form of the verbs in brackets.
1 |
the plumber. i learnt later that john had already phoned him. (phone)
2 1
the plumber. i knew john had already phoned him. (phone)
3 you
your umbrella after all. it hasn't rained. (bring)
4 the forecast was for fine weather so i knew i
my umbrella. (bring)
51
these clothes. i didn't know they had already been washed. (wash)
6 1
a meal last night because we went out and the food i prepared was uneaten. (cook)

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