1. Past continuous tense

2. Past simple tense

3. Past simple tense / Past continuous tense

4. Past perfect tense

1

1 Tom felt guilty and scared.

2 Tom's aunt felt shocked, irritated.

3 Tom's parents felt upset, angry.

2

1 had come -> past perfect

2 were chatting -> past continuous

3 went -> past simple

4 was raining -> past continuous

5 sat -> past simple

6 started -> past simple

7 counced -> past simple

8 landed -> past simple

9 smashed -> past simple

10 had done -> past perfect

11 came -> past simple

12 was staring -> past continuous

3 

1 past continuous

2 past simple

3 past simple - past continuous

4 past perfect

4 

1 Khi tôi đến thì Kim mở cửa ( hai hành động xảy ra liên tiếp)

2 Khi tôi đến thì Kim đang mở cửa ( hành động đang xảy ra thì hành động khác xen vao)

3 Khi tôi đến thì Kim đã mở cửa (hành động xảy ra trước hành động xảy ra sau)