11. She has worked as a secretary for five years.

-> S + started + Ving/to V = S + have/has + Vpp

12. I don't know as much abot it as she does.

13. My French friend isn't used to driving on the left.

-> be used to + Ving/N : trở nên quen với

14. The owner of the house is thought to be abroad.

-> 2 vế cùng thì nên dùng to V

15. If we had had enough money, we would have gone on holiday.

-> If 3: If + had + Vpp, S2 + would + have + Vpp

16. The sea was too rough for the children to swim.

-> S + tobe + too + adj + for SO + to V

17. My car was serviced by the machanic last week.

-> Câu bị động quá khứ: S + was/were + Vpp

18. Traveling by air always makes me nervous.

-> make + SO + adj

19. The car was too expensive for him to buy.

-> S + tobe + too + adj + for SO + to V

20. He suggested that I should put my luggage under the seat.

-> suggest + S + should + Vinf

11. She started working as a secretary five years ago.

=> She has been working as a secretary for 5 years

 12. She knows a lot more about it than I do.

=>I don’t know so much about it as she does.

13. My French friend finds driving on the left difficult.

=> My French friend isn't used to driving on the left

14. They think the owner of the house is abroad.

=>The owner of the house is thought to be abroad.

15, We didn't go on holiday because we did not have enough money.

=>If we had enough money we would have gone on holiday.

16. The children couldn't go swimming because the sea was rough.

=>The sea was too rough for the children to go swimming

17. The mechanic serviced my car last week.

=>i had my car serviced last week  by the mechanic

18,I'm always nervous when I travel by air.

=>Traveling by air always makes me nervous.

19, He couldn't afford to buy the car.

=>The car was too expensive for him to buy.

20,"Why don't you put your luggage under the seat?"he asked.

=>He suggested that I  put my luggage under the seat.