1. walk

`->` everyday `->` HTĐ

2. is walking

`->` now `->` HTTD

`->` HTTD: S + is/are/am + V-ing

3. did you do - visited

`->` last weekend `->` QKĐ

4. eat - are eating

`->` often `->` HTĐ

`->`  now `->` HTTD

5. don't go - went

`->` on Sundays `->` HTĐ

`->` last Saturday `->` QKĐ

6. are swimming

`->` at the moment `->` HTTD

7. doesn't go

`->` often `->` HTĐ

Đáp án:

Giải thích các bước giải:

`1`. Nam and his brother walks to school every day.

`2`. He is walking to school now.

`3`. What did you do last weekend ?

  - We visited our grandparents.

`4`. The children eat meat every day , but now they eating fish.

`5`. We don't go to school on Sundays , but last Sunday we went to school.

`6`. They are swimming in the river at the moment.

`7`. Nam doesn't go to the library very often.

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HTĐ :

a) V tobe

(+) S + is/am/are + O

(-) S + is/am/are + not + O

(?) Is/Am/Are + S + O ?

b) V thường

(+) S + V(s/es) 

(-) S + don't/doesn't + V

(?) Do/Does + S + V ?

DHNB : Các trạng từ chỉ tần suất ( always , usually , often ,... ) ; every + N thời gian ,...

HTTD :

(+) S + is/am/are + V-ing

(-) S + is/am/are + not + V-ing

(?) Is/Am/Are + S + V-ing ?

DHNB : at the moment , at present , at this time , Look! , Listen ! ,...

QKĐ :

a) V tobe

(+) S + was/were + O

(-) S + was/were + not + O

(?) Was/Were + S + O ? 

b) V thường

(+) S + Ved/cột 2

(-) S + didn't + V

(?) Did + S + V ?

DHNB : yesterday , ago , last + N thời gian ,...

VD : last week , last month ,...