1 => By the time I got to the phone it stopped ringing.
Correction: By the time I got to the phone, it had stopped ringing.

2 => I’m not very good at this game. You see, I didn’t play it before.
Correction: I’m not very good at this game. You see, I haven’t played it before.

3 => When has Pete written to you last?
Correction: When did Pete last write to you?

4 => What do you do at weekends? Are you ever going to the cinema?
Correction: What do you do at weekends? Do you ever go to the cinema?

5 => When I was on holiday last summer I was going to the beach every day.
Correction: When I was on holiday last summer, I went to the beach every day.

6 => Julie can’t meet you tomorrow. She will play basketball.
Correction: Julie can’t meet you tomorrow. She is going to play basketball.

• By the time I got to the phone, it had stopped ringing.

  "stopped ringing" should be "had stopped ringing" to indicate a past action completed before another past action.

• I'm not very good at this game. You see, I didn't play it before.

  • This sentence is correct.

• When did Pete last write to you?

  "When has Pete written to you last?" should be "When did Pete last write to you?" to ask about a past action.

• What do you do at weekends? Are you ever going to the cinema?

  • This sentence is correct.

• When I was on holiday last summer, I went to the beach every day.

  "I was going to the beach every day" should be "I went to the beach every day" to describe a repeated past action.

• Julie can't meet you tomorrow. She will be playing basketball.

   "She will play basketball" should be "She will be playing basketball" to indicate a future action in progress.