1 He is interested in living in the countryside

=> Interested + in

2 Lan and hoa is crayzy in playing handball

3 I am keen on listening to music in free time in very interesting

=> Keen + on

4 She is crazy in cleaning the floor is boring

5 I enjoy in collecting stamps 

=> Enjoy in + ving

6 What subject her like?

7 THey are fond of playing marbles in their free time

Cấu trúc :

Favorite + Ving

Enjoy in + Ving

Keen on + ving

Fond of + ving

Crayzy + Ving

1. He is interested in living in the countryside

b interested in + V_ing

2. Lan and Hoa are crazy about playing handball

be crazy about + V_ing

3. I am keen on listening to music in free time 

be keen on + V_ing

4. She is crazy about cleaning the floor

be crazy about + V_ing

5. I like collecting stamp best

like + V_ing

6. What subject does she like best?

What + S + V?

7. They are fond of playing marbles in their free time

be fond of + V_ing