§éng tõ ( verb)
§éng tõ trong tiÕng Anh chia lµm 3 thêi chÝnh:
- Qu¸ khø.
- HiÖn t¹i.
- T¬ng lai.
Mçi thêi chÝnh l¹i chia ra lµm nhiÒu thêi nhá ®Ó x¸c ®Þnh chÝnh x¸c thêi gian cña hµnh ®éng.
HiÖn t¹i (present) HiÖnt¹i ®¬n gi¶n (simple present)
Khi chia ®éng tõ ë ng«i thø 3 sè Ýt, ph¶i cã s ë ®u«i vµ vÇn ®ã ph¶i ®îc ®äc lªn.
VÝ dô:
John walks to school everyday.
- Nã dïng ®Ó diÔn ®¹t 1 hµnh ®éng x¶y ra ë thêi ®iÓm hiÖn t¹i, kh«ng x¸c ®Þnh cô thÓ vÒ mÆt thêi gian vµ hµnh ®éng lÆp ®i lÆp l¹i cã tÝnh quy luËt.
- Nã thêng dïng víi 1 sè phã tõ nh: now, present day, nowadays. §Æc biÖt lµ1 sè phã tõ chØ tÇn suÊt ho¹t ®éng: often, sometimes, always, frequently.
VÝ dô:
They understand the problem now.
Henry always swims in the evening. (thãi quen)
We want to leave now.
Your cough sounds bad.
HiÖn t¹i tiÕp diÔn (present progressive)
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am
Subject + is + [verb +ing ]...
are
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- Nã dïng ®Ó diÔn ®¹t 1 hµnh ®éng ®ang x¶y ra ë thêi hiÖn t¹i. Thêi gian ®îc x¸c ®Þnh cô thÓ b»ng c¸c phã tõ nh now, right now, presently.
- Nã dïng ®Ó thay thÕ cho thêi t¬ng lai gÇn.
VÝ dô:
He is learning in the US.
Lu ý: §Ó ph©n biÖt t¬ng lai gÇn vµ hµnh ®éng ®ang x¶y ra cÇn c¨n cø vµo phã tõ trong c©u)
VÝ dô:
The committee members are examining the material now. ( hiÖn t¹i ®ang kiÓm tra)
George is leaving for France tomorrow. (t¬ng lai gÇn - sÏ rêi tíi Ph¸p vµo ngµy mai)
Present perfect ( hiÖn t¹i hoµn thµnh)
Have + P2
- Dïng ®Ó diÔn ®¹t 1 hµnh ®éng ®· x¶y ra trong 1 qu¸ khø kÐo dµi vµ chÊm døt ë hiÖn t¹i. Thêi gian trong c©u hoµn toµn kh«ng x¸c ®Þnh.
- ChØ 1 hµnh ®éng x¶y ra nhiÒu lÇn trong qu¸ khø kÐo dµi tíi hiÖn t¹i.
- Dïng víi 2 giíi tõ for vµ since + thêi gian.
- Dïng víi already trong c©u kh¼ng ®Þnh, already cã thÓ ®øng sau have nhng nã còng cã thÓ ®øng cuèi c©u.
-
have
Subject + + already + P2
has
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VÝ dô:
We have already written our reports.
I have already read the entire book.
Sam has already recorded the results of the experiment.
- Dïng víi yet trong c©u phñ ®Þnh vµ c©u nghi vÊn phñ ®Þnh, yet thêng xuyªn ®øng ë cuèi c©u, c«ng thøc sau:
-
have
Subject + not + P2 ...+ yet ...
has
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VÝ dô:
John hasn’t written his report yet.
The president hasn’t decided what to do yet.
We haven’t called on our teacher yet.
- Trong 1 sè trêng hîp yet cã thÓ ®¶o lªn ®øng sau to have vµ ng÷ ph¸p cã thay ®æi. Not mÊt ®i vµ ph©n tõ 2 trë vÒ d¹ng nguyªn thÓ cã to.
-
have
Subject + + yet + [verb in simple form] ...
has
|
VÝ dô:
John has yet to learn the material. = John hasn’t learned the material yet.
We have yet to decide what to do with the money. = We haven’t decided what to do with the money yet.
Chó ý: CÈn thËn sö dông yet trong mÉu c©u kÎo nhÇm víi yet trong mÉu c©u cã yet lµm tõ nèi mang nghÜa “nhng”
VÝ dô:
I don’t have the money, yet I really need the computer.
My neighbors never have the time, yet they always want to do something on Saturday nights.
HiÖn t¹i hoµn thµnh tiÕp diÔn ( preset perfect progressive)
Have been + verbing.
- Dïng gièng hÖt nh present perfect nhng hµnh ®éng kh«ng chÊm døt ë hiÖn t¹i mµ vÉn ®ang tiÕp tôc x¶y ra. Nã thêng xuyªn ®îc dïng víi 2 giíi tõ for, since + time.
VÝ dô:
John has been living in the same house for ten years. = John has live in the same house for ten years.
Mét sè thÝ dô
Jorge has already walked to school. (thêi gian kh«ng x¸c ®Þnh)
He has been to California three times. (h¬n 1 lÇn)
Mary has seen this movie before. (thêi gian kh«ng x¸c ®Þnh)
They have been at home all day.
We haven’t gone to the store yet. (thêi gian kh«ng x¸c ®Þnh).
John has worked in Washington for three years.
HoÆc
John has been working in Washington for three years.
(vÉn cha kÕt thóc - John vÉn ®ang lµm viÖc ë Washington).
Ph©n biÖt c¸ch dïng gi÷a 2 thêi
Present perfect
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Present perfect progressive
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Hµnh ®éng chÊm døt ë hiÖn t¹i, do ®ã cã kÕt qu¶ râ rÖt.
VÝ dô:
I have waited for you for half an hour (now I stop waiting)
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Hµnh ®éng vÉn tiÕp tôc tiÕp diÔn á hiÖn t¹i do vËy kh«ng cã kÕt qu¶ râ rÖt.
VÝ dô:
I have been waiting for you for half an hour.
(and continue waiting hoping that you will come)
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