Make the following sentences negative:

1.the waiters do their work well.
2.the dog sleeps all day in the hotel.
3.he knows the correct answer.
4.the students have new textbooks.
5.she tries to play tennis well.
6.i go to bed very early.

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make the following sentences interrogative:

1.his sons go to the local school.
2.they fish in the lake.
3.elephants never forget.
4.the river freezes in winter.
5.she realises the danger.
6.we sometimes miss the bus.