Exercise 1. Make the sentences negative and interrogative.
1. Sick people are treated by doctors
2. The room is beign painted now
3. This gallery was built twenty-seven years ago
4. The seminar was beign held at 3 o'clock yesterday
5. The news will be broadcast in a hour
6. The posters had been hung by 4 o'clock yesterday

Exercise 1. Make the sentences negative and interrogative.

1. Sick people aren't treated by doctors

2. The room isn't beign painted now

3. This gallery wasn't built twenty-seven years ago

4. The seminar wasn't beign held at 3 o'clock yesterday

5. The news won't be broadcast in a hour

6. The posters hadn't been hung by 4 o'clock yesterday

Exercise 1. Make the sentences negative and interrogative.

1. Sick people are treated by doctors , aren't they?

2. The room is beign painted now , isn't it?

3. This gallery was built twenty-seven years ago , wasn't it?

4. The seminar was beign held at 3 o'clock yesterday , wasn't it ?

5. The news will be broadcast in a hour , won't they?

6. The posters had been hung by 4 o'clock yesterday, hadn't they?

Объяснение:

2.they have been living in edinburg for two years

3. he has been waiting for mary more than an hour.

4. they have benn sitting in the garden since dinner time

5. he has been playing tennis since 10 a.m.

6. i have benn learning spanish for 5 years.

7. he has been working for the same company since he left school.

во всех случаях на present perfect continuos указывает промежуток времени и предлоги for, since.

the wether is fine today

it is -7*