`46`. If Hoa had money, she could buy a new bike.

`->` If2 : If + S1 + V2/ed, S2 + would/could + Vinf

`47`. Their house was repaired last year.

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

`48`. It took me one hour to go to work by bicycle.

`->` It + takes/took + SO + thời gian + to V

`49`. I suggest that you (should) make posters on energy saving.

`->` S + suggest + (that) + S2 + (should) + Vinf

`50`. Mary/He asked me if I could give her a lift to school. ( sai đề )

`->` Câu trần thuật có từ để hỏi: S + asked + (O) + if + S2 + V lùi thì

1 if hoa had money she could buy a new bike

-> câu đk loại 2 : if + thì QKĐ , would / could + V nguyên mẫu

2 their house was repaired last year

-> câu bị động thfi QKĐ : s + wa s/ were + VPII + by + O

3 it took me 1 hour to go to work by bike

-> cấu trúc it takes / it took somebody +time +  to V

4 i suggest that you should make posters on energy saving

->cấu trúc s+ suggest + that + O + should + V nguyên mẫu

5 sai đề bn ạ