`6.` My brother spends 3 hours surfing the net every night

S + spend/ spends/ spent + time + V_ing

`7.` I told Jack that he'd better to put his money in the bank

S + told/ said to + O + (that) + S + V_lùi thì

`8.` My teacher asked me if I liked watching films

S + asked + (O) + if/ whether + S + V_lùi thì

`9.` Bicycles should be used for short journeys

S + modal verb (should, must, have to, can,...) + be + PP + (by O)

`10.` It’s interesting to have a trip to her country

It's + adj + to + V_inf

6. My brother spends 3 hours to surf the net every night .

7. I told Jack to put his money in the bank . 

8. My teacher asked me If I like watching films ? 

9. Bicycles should be used for short journeys .

10. It's very interesting to have a trip to her country .