:there are some mistakes in this sentences. correct them. 1. when i came they watched television. 2. he wrote his letter by 10 o clock yesterday. 3. after he has read the book, he wrote a composition. 4. he ate a sandwich when we saw him. 5. what have you done by 5 o clock last night? 6. where is he go tomorrow? 7. who is singing when you came? 8. has he be your friend since childhood. !

1. When I came they were watching television.
2. He had written his letter by 10 o'clock yesterday.
3. After he had read the book, he wrote a composition.
4. He was eating a sandwich when we saw him.
5. What had you done by 5 o'clock last night?
6. Where did he go to tomorrow?
7. Who was singing when you came?
8. Has he been your friend since childhood.