$1$. I haven't visited this city for a month.

It is + thời gian + since + S + last + V(QK) + ...

→ S + have/has + (not) + PII + for/since + thời gian + ...

$2$. I started doing this exercise routine every day 10 years ago.

S + have/has + PII + for/since + ...

→ S + started + to V/V-ing + thời gian + ago

$3$. How about going to the market to buy some fresh vegetables?

Let's go + V(nguyên thể) + ...

→ How about + V-ing + ... ?

$4$. Don't forget to raise your knees high when you jog on the spot.

remember: nhớ = don't forget: đừng quên

Don't forget to...: Đừng quên làm gì

$5$. Why don't we go to the cinema this weekend?

S + suggest + ...

→ Why don't we + V(nguyên thể) + ...

$6$. Parents must be good role models for their children.

must: phải 

(Cha mẹ phải là những hình mẫu lí tưởng cho con của họ.)

1. I haven’t visited this city for a month.

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

2. I started to do this exercise routine every day 10 years ago.

S + has/have + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

--> It is / has been + time + since + S+ V2/ed 

3. How about going to the market to buy some fresh vegetables?

Let’s + V1

= What / How about + Ving?

= Why don’t we / you + V1?

→ đưa ra ý kiến, đề nghị

4. Don’t forget to raise your knees high when you jog on the spot.

Remember + to V: nhớ làm gì = not forget + to V: đừng quên làm gì 

5. Why don’t we go to the cinema this weekend?

6. Parents must be good role models for their children.

must + V1: phải làm gì (mang tính bắt buộc)

`color{orange}{~LeAiFuRuiHuiBao~}`