We have written our reports already yet dùng trong

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We have written our reports already . Yet dùng trong câu ph ñị nh, câu nghi v n. Yet th ườ ng xuyên ñứ ng cu i câu. We have'nt written our reports yet . Have you written your reports yet ? Trong m t s tr ườ ng h p th ph ñị nh, yet có th ñứ ng ngay sau have nh ư ng ph i thay ñổ i v m t ng pháp: ñộ ng t PII tr v d ng nguyên th to và không dùng not . John has yet to learn the material = John hasn't learnt the material yet . 3.1.3.3 Th i hi n t i hoàn thành th ườ ng d ượ c dùng v i m t s c m t ch th i gian nh ư sau: · Dùng v i now that... (gi ñ ây khi mà...) Now that you have passed the TOEFL test successfully, you can apply for the schoolarship. · Dùng v i m t s phó t nh ư till now, untill now, so far (cho ñế n gi ). Nh ng c m t này có th ñứ ng ñầ u câu ho c cu i câu. So far the problem has not been resolved. · Dùng v i recently, lately (g n ñ ây) nh ng c m t này có th ñứ ng ñầ u ho c cu i câu. I have not seen him recently . · Dùng v i before ñứ ng cu i câu. I have seen him before . Xem thêm các ñộ ng t b t quy t c 3.1.4 Present Perfect Progressive (th i hi n t i hoàn thành ti ế p di n) Ch ñố i v i các hành ñộ ng th c lo i (3) c a th i hi n t i hoàn thành chúng ta m i có th dùng th i hi n t i hoàn thành ti ế p di n.
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S ư u t m và thi ế t k ế b i Ph m Vi t V ũ - 14 – Tr ườ ng ðạ i H c Kinh T ế ð à N ng John has been living in that house for 20 years. = John has lived in that house for 20 years. Phân bi t cách dùng gi a hai th i: Present Perfect Present Perfect Progressive Hành ñộ ng ñ ã ch m d t hi n t i do ñ ó ñ ã có k ế t qu rõ r t. I've waited for you for half an hour. (and now I stop waiting because you didn't come). Hành ñộ ng v n ti ế p di n hi n t i, có kh n ă ng lan t i t ươ ng lai do ñ ó không có k ế t qu rõ r t. I've been waiting for you for half an hour. (and now I'm still waiting, hoping that you'll come) 3.2 Past tenses (các th i quá kh ) 3.2.1 Simple Past (th i quá kh th ườ ng): Dùng ñể di n ñạ t m t hành ñộ ng ñ ã x y ra d t ñ i m t i m t th i gian xác ñị nh trong quá kh (không còn di n ra ho c nh h ưở ng t i hi n t i). Th i ñ i m trong câu ñượ c xác ñị nh rõ r t b ng m t s các phó t ch th i gian nh ư : yesterday, at that moment, last week, ...
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