`1.` I'm interested in collecting birthday cards.

`-` find sth interesting `=` be interested in + V-ing: thích làm gì đó

`2.` She prefers socializing with friend to watching TV.

`-` like + V-ing + more than + V-ing `=` prefer + V-ing + to + V-ing: thích làm gì đó hơn làm gì đó

`3.` Unless you study hard, you won't pas the mid-term test.

`-` Câu điều kiện loại 1: If + HTĐ (S + don't/doesn't + V-inf), S + will/can/may/... + (not) + V(bare)

`->` Unless + HTĐ (S + V-s/es), S + will/can/may/... + (not) + V(bare)

`4.` Would you mind helping me with this exercise?

`-` Please + V(bare)

`->` Would you mind + V-ing?: Bạn có phiền khi làm gì đó không?

`5.` Let's take a break and relax for a while.

`-` Why don't we + V(bare)?

`->` Let's + V(bare): Hãy làm gì đó

`6.` I really enjoy going fishing in the rural areas.

`-` V-ing + tobe (is) + enjoyable

`->` S + enjoy(s) + V-ing: Ai đó thích làm gì đó