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英語(yǔ)的時(shí)態(tài)(tense)是一種動(dòng)詞形式,不同的時(shí)態(tài)用以表示不同的時(shí)間與方式。
是表示行為、動(dòng)作和狀態(tài)在各種時(shí)間條件下的動(dòng)詞形式。因此,當(dāng)我們說(shuō)時(shí)態(tài)結(jié)構(gòu)的時(shí)候,指的是相應(yīng)時(shí)態(tài)下的動(dòng)詞形式。
英語(yǔ)時(shí)態(tài)分為16種:一般現(xiàn)在、一般過(guò)去、一般將來(lái)、過(guò)去將來(lái)時(shí),以及這四者的進(jìn)行時(shí)、完成時(shí)和完成進(jìn)行時(shí)
下面就英語(yǔ)中常見的八種基本時(shí)態(tài)進(jìn)行闡述,其它的時(shí)態(tài)都是在這八種時(shí)態(tài)的基礎(chǔ)上結(jié)合而成的。
一、 一般現(xiàn)在時(shí):
1.概念:經(jīng)常、反復(fù)發(fā)生的動(dòng)作或行為及現(xiàn)在的某種狀況。
2.時(shí)間狀語(yǔ): always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
3.基本結(jié)構(gòu):動(dòng)詞 原形 (如主語(yǔ)為第三人稱單數(shù),動(dòng)詞上要改為第三人稱單數(shù)形式)
4.否定形式:am/is/are+not;此時(shí)態(tài)的謂語(yǔ)動(dòng)詞若為行為動(dòng)詞,則在其前加don't,如主語(yǔ)為第三人稱單數(shù),則用doesn't,同時(shí)還原行為動(dòng)詞。
5.一般疑問(wèn)句:把be動(dòng)詞放于句首;用助動(dòng)詞do提問(wèn),如主語(yǔ)為第三人稱單數(shù),則用does,同時(shí),還原行為動(dòng)詞。
6.例句:. It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
二、 一般過(guò)去時(shí):
1.概念:過(guò)去某個(gè)時(shí)間里發(fā)生的動(dòng)作或狀態(tài);過(guò)去習(xí)慣性、經(jīng)常性的動(dòng)作、行為。
2.時(shí)間狀語(yǔ):ago, yesterday, the day before yesterday, last week,last(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
3.基本結(jié)構(gòu):be動(dòng)詞;行為動(dòng)詞 的過(guò)去式
4.否定形式:was/were+not;在行為動(dòng)詞前加didn't,同時(shí)還原行為動(dòng)詞。
5.一般疑問(wèn)句:was或were放于句首;用助動(dòng)詞do的過(guò)去式did 提問(wèn),同時(shí)還原行為動(dòng)詞。
6.例句:She often came to help us in those days.
I didn't know you were so busy.
三、 現(xiàn)在進(jìn)行時(shí):
1.概念:表示現(xiàn)階段或說(shuō)話時(shí)正在進(jìn)行的動(dòng)作及行為。
2.時(shí)間狀語(yǔ):now, at this time, these days, etc.
3.基本結(jié)構(gòu):am/is/are+doing
4.否定形式:am/is/are+not+doing.
5.一般疑問(wèn)句:把be動(dòng)詞放于句首。
6.例句: How are you feeling today?
He is doing well in his lessons.
四、 過(guò)去進(jìn)行時(shí):
1.概念:表示過(guò)去某段時(shí)間或某一時(shí)刻正在發(fā)生或進(jìn)行的行為或動(dòng)作。
2.時(shí)間狀語(yǔ):at this time yesterday, at that time或以when引導(dǎo)的謂語(yǔ)動(dòng)詞是一般過(guò)去時(shí)的時(shí)間狀語(yǔ)等。
3.基本結(jié)構(gòu):was/were+doing
4.否定形式:was/were + not + doing.
5.一般疑問(wèn)句:把was或were放于句首。
6.例句:At that time she was working in a PLA unit.
When he came in, I was reading a newspaper.
五、 現(xiàn)在完成時(shí):
1.概念:過(guò)去發(fā)生或已經(jīng)完成的動(dòng)作對(duì)現(xiàn)在造成的影響或結(jié)果,或從過(guò)去已經(jīng)開始,持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)。
2.時(shí)間狀語(yǔ):recently, lately, since…for…,in the past few years, etc.
3.基本結(jié)構(gòu):have/has + done
4.否定形式:have/has + not +done.
5.一般疑問(wèn)句:have或has。
6.例句:I've written an article.
The countryside has changed a lot in the past few years.
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