1. I have never gone out for a picnic before.

This / It is the first time + S + has/shave + V3/ed 

= S+  has/have+ never/not + V3/ed + before

2. My friend advised me not to ask him for help.

S + advised + O  +to V / not to V: khuyên 

3. I find it difficult to understand what he implies.

find + it + ADJ + to V : nhận ra nó như thế nào để ... 

4. If I knew her address, I would meet Nga.

If 2: If + S + V2/ed, S + would / could + V1 

5. Jack doesn’t drive as carefully as him.

S + (not) + V + as +ADV + as+ O : ss bằng 

6. I wish I didn’t have to get up early tomorrow.

S + wish(es) + S+ V2/ed: ước ở hiện tại 

7. I have never heard about the tram system in Hanoi before.

8. The Little Prince is the most interesting novel I have ever read.

S + be+ the most + long-adj + N + S+ has/have + V3/ed