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    初二英語(yǔ): Astronauts work

    初一、二時(shí)態(tài):如下:八大時(shí)態(tài)
    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)詞上要加(e)S)

    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(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

    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(kāi)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 +d one.

    5.一般疑問(wèn)句:have或has。

    6.例句:I've written an article.

    It has been raining these days.

    六、 過(guò)去完成時(shí):

    1.概念:以過(guò)去某個(gè)時(shí)間為標(biāo)準(zhǔn),在此以前發(fā)生的動(dòng)作或行為,或在過(guò)去某動(dòng)作之前完成的行為,即“過(guò)去的過(guò)去”。

    2.時(shí)間狀語(yǔ):before, by the end of last year(term, month…),etc.

    3.基本結(jié)構(gòu):had + done.

    4.否定形式:had + not + done.

    5.一般疑問(wèn)句:had放于句首。

    6.例句:As soon as we got to the station, the train had left.

    By the end of last month. We had reviewed four books

    七、 一般將來(lái)時(shí):

    1.概念:表示將要發(fā)生的動(dòng)作或存在的狀態(tài)及打算、計(jì)劃或準(zhǔn)備做某事。

    2.時(shí)間狀語(yǔ):tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.

    3.基本結(jié)構(gòu):am/is/are/going to + do;will/shall + do.

    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:be放于句首;will/shall提到句首。

    6.例句:They are going to have a competition with us in studies.

    It is going to rain.

    八、 過(guò)去將來(lái)時(shí):

    1.概念:立足于過(guò)去某一時(shí)刻,從過(guò)去看將來(lái),常用于賓語(yǔ)從句中。

    2.時(shí)間狀語(yǔ):the next day(morning, year…),the following month(week…),etc.

    3.基本結(jié)構(gòu):was/were/going to + do;would/should + do.

    4.否定形式:was/were/not + going to + do;would/should + not + do.

    5.一般疑問(wèn)句:was或were放于句首;would/should 提到句首。

    6.例句:He said he would go to Beijing the next day

    B 作為一個(gè)特殊的行業(yè),所以B

    D

    B

    相關(guān)評(píng)說(shuō):

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