1. His sister (to study) English every day. - studies (Present Simple, так как действие происходит регулярно).
2. She (to study) English two hours ago. - studied (Past Simple, так как указано конкретное время в прошлом).
3. You (to come) home at six o'clock yesterday? - No, I .... Yesterday I (to come) home from school at half past eight. I (to be) very tired. I (to have) dinner with my family. After dinner I (to be) very thirsty. I (to drink) two cups of tea. Then I (to rest).
You (to come) ... yesterday? - Did you come (Past Simple, вопрос о прошлом).
Yesterday I (to come) ... - came (Past Simple, факт из прошлого).
I (to be) ... tired. - was (Past Simple, состояние в прошлом).
I (to have) ... - had (Past Simple, действие в прошлом).
I (to be) ... thirsty. - was (Past Simple, состояние в прошлом).
I (to drink) ... - drank (Past Simple, действие в прошлом).
Then I (to rest). - rested (Past Simple, действие в прошлом).
4. I (to go) to bed at ten o'clock every day. - go (Present Simple, регулярное действие).
5. I (to go) to bed at ten o'clock yesterday. - went (Past Simple, конкретное время в прошлом).
6. My brother (to wash) his face every morning. - washes (Present Simple, регулярное действие).
7. Last night he (to wash) his face with soap and water. - washed (Past Simple, конкретное время в прошлом).
8. I (not to have) history lessons every day. - do not have / don't have (Present Simple, регулярное отсутствие действия).
9. We (not to rest) yesterday. - did not rest / didn't rest (Past Simple, отрицание действия в прошлом).
10. My brother (not to drink) coffee yesterday. - did not drink / didn't drink (Past Simple, отрицание действия в прошлом).
11. My mother always (to take) a bus to get to work, but yesterday she (not to take) a bus. Yesterday she (to walk) to her office.