Question

1) Before I (to leave) for work yesterday, I (to drink) a cup of coffee. 2) By the end of the week (I to finish) working on my report. 3) Ten years ago I (to fly) to Paris. 4) His dad and brother (to cycle) to the shop now. 5) You arrived at the cinema late. The film (to start) already. 6) We (to do) the washing by 8 o'clock next Monday. 7) Most of the Earth's surface (to cover) by water. 8) While I was on holiday, my camera (to steal) from my hotel room. 9) We went to Laila's house but she (not to be) at home. 10) I never (to be) in Spain.

Answer 1

Думаю, что так
1. left - had drunk
2. will have finished
3. flied
4. are cycling
5. have already started
6. will have done
7. is covered
8. was stolen
9. was not
10. have never been

Answer 2

Past Tense Usage in Sentences

1) Before I left for work yesterday, I drank a cup of coffee. - The past simple tense is used to describe an action that happened at a specific time in the past. In this case, the action of drinking a cup of coffee occurred before leaving for work yesterday. - Source: 2) By the end of the week, I finished working on my report. - The past simple tense is used to express an action that was completed at a specific time in the past. In this sentence, the action of finishing working on the report is described as completed by the end of the week. - Source: [[2]](https://fsc.bsu.by/wp-content/uploads/2015/12/Prakticheskaya-grammatika-1-kurs-English-Grammar-Practice-uchebno-metodicheskoe-posobie.pdf)

3) Ten years ago, I flew to Paris. - The past simple tense is used to indicate an action that occurred at a specific time in the past. In this case, the action of flying to Paris happened ten years ago. - Source: 4) His dad and brother are cycling to the shop now. - The present continuous tense is used to describe an action that is happening at the moment of speaking. However, the sentence should be in the past tense to match the other sentences. The correct past tense form would be "His dad and brother cycled to the shop." - Source: N/A

5) You arrived at the cinema late. The film had already started. - The past perfect tense is used to indicate that an action was completed before another action in the past. In this case, the film had already started when the person arrived at the cinema. - Source: [[4]](http://renovenergies.fr/2018/12/14/use-of-concrete/)

6) We will have done the washing by 8 o'clock next Monday. - The future perfect tense is used to describe an action that will be completed before a specific time in the future. In this sentence, the action of doing the washing will be completed by 8 o'clock next Monday. - Source: N/A

7) Most of the Earth's surface is covered by water. - The present simple tense is used to express a general truth or fact. In this sentence, it describes the current state of the Earth's surface being covered by water. - Source: N/A

8) While I was on holiday, my camera was stolen from my hotel room. - The past simple tense and past continuous tense are used to describe actions that were ongoing or completed in the past. In this sentence, the camera was stolen during the past continuous action of being on holiday. - Source: N/A

9) We went to Laila's house, but she wasn't at home. - The past simple tense is used to describe an action that occurred and was completed in the past. In this case, the action of going to Laila's house happened in the past, and she was not at home at that time. - Source: N/A

10) I have never been in Spain. - The present perfect tense is used to indicate that an action started in the past and continues into the present, or that the action happened at an unspecified time in the past. In this sentence, the action of never being in Spain is described as true up to the present moment. - Source: N/A