4 Going out with friends on weekends is interesting.
adj+ to V = Gerund + with sb + be+ adj
5 I am used to going to bed late.
be used to + V-ing / N
6 Shall we go to the cinema tonight?
What about + V-ing? = Shall we + V ( bare inf ) ………?
7 He asked me why I didn't go with him.
8 She is interested in going swimming
enjoy = interested in
9 Does it take Nam most of his free time to play computer games.
spend + khoảng thời gian + doing something
= it takes/took (for somebody) to do something: dành thời gian để làm gì
10 Do you spend 3 hours doing this task?
It takes/took (sb) + time + to do something = S + spend/spent + time/money + V-ing.