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.
– I haven’t read this book before.
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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. – I haven’t read this book before. * 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. – The last time I heard him was in August. I haven’t seen him since I left school. – I last saw him when 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. – I began working here ten years ago. It started raining two days ago. – It has rained for two days.
File đính kèm:
chuyen doi thi.docx
