Laboratory work
i. a) repeat the sentences after the tape. b) make them interrogative
and negative.
ii. use the sentences in indirect speech. mind the change in intona-
tion.
iii. paraphrase the sentences using a great deal and a good deal
instead of a lot.
iv. paraphrase the sentences using a great number and a great
many instead of a lot.
v. a) use the adjectives unhappy, bad, awful, nervous, frightened,
ill, strange instead of the adjective happy. b) use the nouns taxi, bus,
tram, trolley-bus, pony instead of the noun bicycle.
v. a) use the adjectives gay, pretty, clever, kind, dull instead of
the adjective quick. b) compose exclamatory sentences beginning with
what use the following word combinations: a strong wind, a high
mountain, a bright student, a kind woman.​

The vegetables have been boiling since 10 o'clock.

I have boiled the vegetables, you may cook salad.

I have waited for your answer for a week, but in vein.

I have been waiting wait) for your answer for a week, and here it is!

I have been trying to find my documents since last Sunday.

At last I have found my documents.

Father has been drilling holes in the wall since noon.

Father has drilled holes in the wall, and now he is hanging shelves.

We have been saving the money for our holiday for a year.

We have saved a lot of money for our holiday, and now we are going to Europe.​

The vegetables have been boiling since 10 o'clock.

I have boiled the vegetables, you may cook salad.

I have waited for your answer for a week, but in vein.

I have been waiting wait) for your answer for a week, and here it is!

I have been trying to find my documents since last Sunday.

At last I have found my documents.

Father has been drilling holes in the wall since noon.

Father has drilled holes in the wall, and now he is hanging shelves.

We have been saving the money for our holiday for a year.

We have saved a lot of money for our holiday, and now we are going to Europe.​