特黄特色三级在线观看免费,看黄色片子免费,色综合久,欧美在线视频看看,高潮胡言乱语对白刺激国产,伊人网成人,中文字幕亚洲一碰就硬老熟妇

學(xué)習(xí)啦 > 新聞資訊 > 學(xué)習(xí)資訊 > 小學(xué)英語(yǔ)五年級(jí)語(yǔ)法講解:現(xiàn)在完成時(shí)

小學(xué)英語(yǔ)五年級(jí)語(yǔ)法講解:現(xiàn)在完成時(shí)

時(shí)間: 燕妮639 分享

小學(xué)英語(yǔ)五年級(jí)語(yǔ)法講解:現(xiàn)在完成時(shí)

  小學(xué)英語(yǔ)五年級(jí)語(yǔ)法講解:現(xiàn)在完成時(shí)

  構(gòu)成:主語(yǔ)+助動(dòng)詞have, has+過(guò)去分詞

  用法:

  1) 表示過(guò)去發(fā)生的和現(xiàn)在有某種聯(lián)系的動(dòng)作,常和just, usually, already, since等時(shí)間副詞連用

  I have just had lunch. (飽了,不用再吃了)

  He has had a cup of tea.(不渴了,不用再喝)

  They have already had their holiday. (不能再度假了)

  The boy has already read the book. (已經(jīng)知道書的內(nèi)容了,不用再看了)

  2) 詢問(wèn)別人是否做過(guò)某事一般用現(xiàn)在完成時(shí):

  Have you finished your homework?

  Have you been to Beijing?

  Have he seen the film?

  3) 表示開始于過(guò)去并持續(xù)到現(xiàn)在的動(dòng)作

  I have lived in Beijing for twenty years.

  I have worked for this school for 1 year.

  4) 表示一種經(jīng)歷,經(jīng)驗(yàn):去過(guò)…地方,做過(guò)…事情,經(jīng)歷過(guò)…事情

  I have never had a bath.

  I have never seen a film.

  I have never been to cinema.

  I have ever been to Paris.

  Have been to表示去過(guò),have gone to 表示去了

  I have been to London.(人已經(jīng)回來(lái))

  He has gone to London.(人還在那里)

  5) 表示一種結(jié)果, 一般不和時(shí)間副詞聯(lián)用

  I have lost my pen.

  I have hurt myself.

  He has become a teacher.

  She has broken my heart.

  句型變化:

  ★變疑問(wèn)句將助動(dòng)詞移到句首,變否定句在助動(dòng)詞后面加not.

  e.g. Have you lost your pen? I have not lost my pen.

  ★肯定回答及否定回答

  Yes, I have. No, I have not.

  ★特殊疑問(wèn)句:

  What have you done?

  What has he done?

  一般過(guò)去時(shí)與現(xiàn)在完成時(shí)的區(qū)別:

  凡是有明確的表示過(guò)去的時(shí)間狀語(yǔ)的句子為過(guò)去時(shí)

  注意:有些動(dòng)詞表示的動(dòng)作有一個(gè)終點(diǎn),不能再延續(xù),因此不能和表示一段時(shí)間狀語(yǔ)連用

  錯(cuò):I’ve left Beijing for 3 days.

  對(duì):I left Beijing 3 days ago. I have been away from Beijing for 3 days.

166020