Sure! Here are the sentences filled in with the correct tense forms and explanations for each:

1. His life **is** so boring. He just **watches** TV every night.
- Present simple to express a general fact about his life and a habitual action.

2. I **was** late for school yesterday.
- Past simple to indicate a completed action that occurred at a specific time in the past.

3. My father **was not** at the office the day before yesterday.
- Past simple negative form to state that he was not present at that time.

4. Did Mr. and Mrs. James **come** back home and have lunch late last night?
- Past simple to ask about completed actions that occurred last night.

5. How did you **get** there?
- Past simple interrogative form; asking about a completed action.

6. John **studies** hard in class, but I **don’t think** he'll pass.
- Present simple for a habitual action (studies) and present simple for a belief (don't think).

7. It **was** cloudy yesterday.
- Past simple to describe the weather at a specific time in the past.

8. Where **are** your children?
- Present simple to ask about the current whereabouts of the children.

9. The telephone **rang** several times and then **stopped** before I could answer it.
- Past simple to describe completed actions that occurred in a sequence.

10. The bank **closes** at four o'clock.
- Present simple to express a fact about a regular schedule.

11. The little boy **spends** hours in his room making his toys.
- Present simple for a habitual action.

12. Jamie passed the exam because he **studied** very hard.
- Past simple is used because the action of studying happened in the past prior to passing the exam.

13. My mother **fries** eggs for breakfast every morning.
- Present simple to indicate a regular activity.

14. Mozart **had** more than 600 pieces of music.
- Past simple to refer to a completed action relevant to Mozart's history.

15. My father **did not watch** TV last night but I **did**.
- Past simple negative for "did not watch" and affirmative for "did" to indicate completed actions.


### Summary of Verbal Forms:

- **Present Simple**: Used for habitual actions, general truths, and schedules.
- **Past Simple**: Used for completed actions in the past.
- **Interrogative Form**: For asking questions, generally follows the structure of "Did/Was/Are" + subject + verb.

If you have any further questions, feel free to ask!