1. My sister (get)..... married last month. 2. Daisy (come) .....to her grandparents’ house 3 days ago. 3. My computer (be )....... broken yesterday. 4. He (buy)..... me a big teddy bear on my birthday last week. 5. My friend (give).... me a bar of chocolate when I (be) at school yesterday. 6. My children (not do) ....their homework last night. 7. You (live) here five years ago? 8. They (watch)..... TV late at night yesterday. 9. Your friend (be)..... at your house last weekend? 10. They (not be) excited about the film last night.

Đáp án+Giải thích các bước giải:

1. get → got

2. come → came

3. be → was

4. buy → bought 

5. give → gave / be → was

6. not do → didn't do

7. Did you live

8.watch → watched

9. be → Were ( chuyển lên trước chủ ngữ)

10. not be → weren't 

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CÔNG THỨC THÌ QUÁ KHỨ ĐƠN:

Đối với động từ tobe:

(+) S + be + O

(-) S  + be + not + O

(?) Be + S + not?

*be =were/was

Đối với động từ thường:

(+) S + V2/V_ed + O

(-) S + didn't + V (infi) + O

(?) Did + S + V (infi) + O?

     - Yes, S + did

     - No, S + didn't