CHUYỂN ĐỔI TỪ THÌ HIỆN TẠI HOÀN THÀNH SANG

THÌ QUÁ KHỨ ĐƠN (VÀ NGƯỢC LẠI)

* Dạng 1:
S + HTHT (phủ định) + for + thời gian
It’s + thời gian ….+ since …+ last + QKĐ (khẳng định)

Ex: I haven’t seen my father for one month.

– It is one month since I last saw my father.

Tom hasn’t had his hair cut for over three months.

– It is three months since Tom last had his hair cut.

* Dạng 2:
S + HTHT (phủ định) + before
     It’s + the first time + S + HTHT (khẳng định)

Ex: I haven’t seen that man here before.

– It is the first time I have met that man here.

It is the first time I have read this book.

* Dạng 3:     
–  S + HTHT (phủ định) + since / for + …..
– S + last + QKĐ (khẳng định) …+ when + mệnh đề
– The last time + S + QKĐ (khẳng định) + was + thời gian

Ex: I haven’t heard him since August.

I haven’t seen him since I left school.

* Dạng 4:
S + HTHT (khẳng định) + for + thời gian
– S + began / started + V-ing + thời gian + ago

Ex: I have worked here for ten years.

It started raining two days ago.

– It has rained for two days.