Make an interrogative and negative sentence in Present Perfect tense.
They have written three letters already.
Make an interrogative and positive sentence in Past Perfect Tense:
I had not gone home.
Put the verbs into the correct form (past continuous) and make a general question.
Yesterday at six I (prepare) dinner.
While Aaron (work) in his room, his friends (swim) in the pool.
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2 Cheese is made from milk.

3 The roof of the building was damaged in a storm a few days ago.

4 You were invited to the wedding. Why didn't you go?

5 A cinema is a place where films are shown.

6 In the United States, elections for president are held every four years.

7 Originally the book was written in Spanish, and a few years ago it was translated into English.

8 Although we were driving fast, we were overtaken by a lot of other cars.

9 You can't see the house from the road. lt is surrounded by trees.

1 How is glass made?

2 When was television invented?

3 How are mountains formed? (горы вообще) или How were the mountains formed? (про конкретные горы)

4 When were antibiotics discovered?

5 What is silver used for?

You will fall and break your leg. (I was afraid you would fall and break your leg 2. My friend has never been to Washington. (I knew my friend had never been to Washington. 3. She never drinks milk. (I was told she never drank milk 4. He is a very talented singer. (We were told he was a very talented singer. 5. They live a happy life. (We knew they lived a happy life. 6. The children are playing in the yard. (She thought the children were playing in the yard. 7. Her friend will come to see her. (She hoped her friend would come to see her. 8. Father has repaired his bicycle. (He thought Father had repaired his bicycle. 9. She knows English very well. (I supposed that she knew English very well. 10. Our sportsmen will win the game. (We were sure our sportsmen would win the game.