1. I gave him a book which was bought from oversea.

N (vật) + which + V /S + V 

2. I suggest having spaghetti and pizza tonight.

suggest + Ving: đề nghị 

3. She said to me that she would go to China the next week.

S + said to + O + that + S+ V (lùi thì)

will --> would 

next ... --> the next .. / the following ...

4. I will buy some comic books in the future.

S + will + V1: thì TLĐ

5. If I knew his number, I could phone him.

If 2: If + QKĐ, S  + would / could + V1 

`color{orange}{~MiaMB~}`