1. when writing you should not copy the whole paragraph on the internet.

-> When you….......cpying the whole paragraph on the internet 
2. He was tired of doing too much typing work

-> Doing….....feel tired
3. Your book costs half as mine

-> My book is.........as mine4. You were so impolite to ask about his age.

-> It was….........to ask about his age
5. Does it bother you much if I borrow your car?

-> Would you…........

1 When you write, it's important to avoid copying the whole paragraph from the internet.

- When + V-ing = When + S + V.

- It + be + adj + to V-inf.

- It's important (for sb) to do sth: Thật quan trọng (cho ai đó) làm gì. = sb should do sth: Nên làm gì.

2 Doing so much typing work made him feel tired.

- Make sb do sth: Khiến ai đó làm gì.

- Feel adj.

- V-ing đứng đầu làm chủ ngữ.

3 My book is twice as expensive as yours

- So sánh gấp đôi: S + be/V + twice as + adj/adv + as + N/pro.

4. It was impolite of you to ask about his age.

- Be impolite (of sb) to do sth: Thật bất lịch sự khi làm gì.

5 Would you mind if I borrowed your car?

- Would + S mind + if + S + V2/ed + O?: Có phiền nếu làm gì không.