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1. Ba has collected stamps since 1995.
Stamps have been collected by Ba since 1995
2. We have finished all the assignments already.
All the assignments have been finished already
3. Some robots have performed a lot of difficult duties so far.
A lot of difficult duties have been performed by robots so far
4. No one has taken him to the theater.
He hasn't been taken to the theater
5. Daisy has never met this man before.
This man has never beeen met by Daisy
6. They have just introduced a new kind of iphone in the USA.
A new kind of iphone has just been introduced in the USA
7. Police have caught the thief recently.
The thief has been caught by police recently
8. Nam has helped Lan with her homework since 2 o’clock.
Lan has been helped with her homework by Nam since 2 o’clock.
9. Has your father repaired the car yet ?
Has the car been repaired by your father yet?
1. He (finish) ……had finished………the work before we (get) …got……back last night.
2. If he (work ) ……works……hard today, he (can/have) …can he have………a holiday tomorrow?
3. A lot of people (kill) ……had been killed……before the rescue workers (arrive) …arrived………
4. The Ring of Fire (believe) …is beleived………(be) is…the most dangerous place with usual volcanic eruptions and earthquakes.
5. The wildlife (be) ……will be………in danger if we (not care) …don't care…for them.
6. Unless I have a quiet room I (not be able/do) …won't be able to do……any work.
7. We (take) ……will take……an umbrella because it (look) …looks……as if it was going to rain.
8. What noisy neighbor you have got! If my neighbours (be) …are……as bad as yours, I (go) …will go…crazy.
9. When we (get) …goy……there we could see that they (not expect) …didn't expect…us at all.
10. All the trapped people in the collapsed building (cry) …were crying…for help when we came.
`1.` has lived
`2.` worked
`3.` have you finished
`4.` have never been
`5.` played `-` was
`6.` have finished
`7.` have worked `-` began
`8.` have already eaten
`9.` learned `-` has played
`10.` bought
`11.` went `-` has been
_
Khi nào dùng thì quá khứ đơn, khi nào dùng thì hiện tại hoàn thành?
*Structure: Past Simple (Thì Quá Khứ Đơn): Diễn tả một sự việc, hành động đã xảy ra trong quá khứ và cũng đã kết thúc trong quá khứ.
`-` Động từ to be:
\(\left(+\right)\) S + were/was ....
\(\left(-\right)\) S + were/was not ....
\(\left(?\right)\) Were/Was + S ...?
`+` Ngôi thứ `3` số ít: he/ she/ it/ name/ danh từ số ít `->` was
`+` Ngôi thứ `1` số nhiều: we/ you/ they/ danh từ số nhiều `->` were
`+` Ngôi thứ `1` số ít: I `->` were
`-` Động từ thường:
\(\left(+\right)\) S + V2/ed ....
\(\left(-\right)\) S + didn't (did not) + V-bare ....
\(\left(?\right)\) Did + S + V-bare ...?
*Structure: Present Perfect (Thì Hiện Tại Hoàn Thành): Diễn tả một sự việc, hành động đã xảy ra trong quá khứ và tiếp tục diễn ra đến hiện tại và có thể trong tương lai vẫn còn.
\(\left(+\right)\) S + have/has + V3/ed ....
\(\left(-\right)\) S + have/has not + V3/ed .....
\(\left(?\right)\) Have/Has + S + V3/ed ...?
`+` Ngôi thứ `3` số ít: he/ she/ it/ name/ danh từ số ít `->` has/has not (hasn't)
`+` Ngôi thứ `1` số nhiều: we/ you/ they/ danh từ số nhiều `->` have/have not (haven't)
`+` Ngôi thứ `1` số ít: I `->` have.
has killed
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