$adelia

1) I.........my Maths homework yesterday. (to do)

`=>` I $\text{do}\ my maths homework yesterday.

`<=>` Dấu hiệu: yesterday

⇒ Cấu trúc: S + V2/ed

⇒ do (v2) `->` did

2).........Susan.........to England by plane? (to go)

`=>` Did Susan go to England by plane?

`=>` Cấu trúc: Did + S + V0 +....?

`=>` Trợ động từ "Did" đã được chia về quá khứ nên động từ sau giữ nguyên.

3) They.........a farm two weeks ago. (to visit)

`=>` They visited a farm two weeks ago.

→ Dấu hiệu: two weeks ago

`=>` Cấu trúc: S + V2/ed + ..

4) Jenny and Peggy.........their brother. (not/to help)

`=>` Jenny and Peggy didn't help their brother.

→ Cấu trúc: S + did + not + V0 +...

→ Trợ động từ "Did" đã được chia về quá khứ nên động từ sau giữ nguyên.

5) The children.........at home last weekend. (not/to be)

`=>` The children weren't at home last weekend.

`=>` Cấu trúc: S + was/were + not +..

`=>` Dấu hiệu: last weekend

6) When.........you.........this wonderful skirt? (to design)

`=>` did/design

`=>`  Wh question: When + did + S + V0 + ..?

7) My mother.........into the van. (not/to crash)

`=>` didn't crash

→ Cấu trúc: S + did + not + V0 +...

8) The boys.........the mudguards of their bicycles. (to take off)

`=>` took off

S + v2/ed+..

9).........you.........your aunt last week? (to phone)

`=>` did/phone

`=>` Cấu trúc: Did + S + V0 +....?

10) He.........milk at school. (not/to drink)

`=>` didn't drink

`=>` → Cấu trúc: S + did + not + V0 +...

1. did

yesterday => quá khứ đơn

2. has/gone

không có thời gian cụ thể => hiện tại hoàn thành

3. visited

ago => quá khứ đơn

4. haven't helped

tương tự 2

5. were not

last weekend => quá khứ đơn

6. have/designed

tương tự 2

7. hasn't crashed

tương tự 2

8. took off

tương tự 2

9. did/phone

last week => quá khứ đơn

10. hasn't drunk

tương tự 2