Simply form: Have/has + V-participle.
Use:
- The action in the past has a result now. Hành động trong quá khứ có kết quả hiện tại. Example: I can’t find my bag. Have you seen it?
- We often use the present perfect to give new information or to announce a recent happening. Example: Ow! I’ve cut my finger.
Trạng từ (adverb) dùng trong HTHT, điển hình: just, already, yet.
Ex: Hi. Have you just arrived?
Phân biệt been/gone:
Ex: Jim is away on holiday. He has gone to Spain. (= he is there now or on his way there)
Jane is back home from holiday now. She has been to Italy. (= she has now come back from Italy).
Mathematics 