亚洲午夜精品一区二区|亚洲精品无播放在线播放|中文字幕淫亂視頻|亚洲乱码中文欧美第一页

<noscript id="46mo9"></noscript>
    <style id="46mo9"><mark id="46mo9"></mark></style>
<form id="46mo9"><optgroup id="46mo9"></optgroup></form>
<sub id="46mo9"><tr id="46mo9"></tr></sub>
  • 
    

    1. <bdo id="46mo9"></bdo>
      <rp id="46mo9"></rp>

      北京KET語法點(diǎn)09期:現(xiàn)在完成體Present perfect

      點(diǎn)擊領(lǐng)取>>>KET/PET官方真題匯總、官網(wǎng)樣卷試題、聽力閱讀答題卡、高頻必備單詞表


      完成體是動(dòng)詞的一種形式,

      它表示該動(dòng)詞所表示的動(dòng)作或狀態(tài)已經(jīng)完成。

      現(xiàn)在完成體由have/has+-ed分詞構(gòu)成


      ⑴現(xiàn)在完成體的肯定形式和否定形式



      ⑵現(xiàn)在完成體的疑問形式和回答形式



      ⑶ 動(dòng)詞的分詞形式

      ①The past participle form of regular verbs is the same as the past simple: 

      walk-walked,smile-smiled


      ②You will need to learn the past participle form of irregular verbs.Here are some common examples.


      總結(jié):大多數(shù)動(dòng)詞的過去時(shí)和-ed分詞都是在原形之后加詞尾 -ed 構(gòu)成(如 study/studied/studied,stop/stopped/stopped),這類動(dòng)詞叫做規(guī)則動(dòng)詞。有一些動(dòng)詞不以加詞尾-ed 的方式構(gòu)成過去時(shí)和 -ed分詞(如 cut/cut/cut, build/built/built, begin/began/begun),這類動(dòng)詞叫做不規(guī)則動(dòng)詞。


      第一類不規(guī)則動(dòng)詞是它們的三個(gè)主要形式(即原形、過去時(shí)、-ed分詞)同形:

      hit/hit/hit

      set/set/set

      put/put/put


      第二類不規(guī)則動(dòng)的特點(diǎn)是它們的過去時(shí)與 -ed分詞同形:

      deal/dealt/dealt

      flee/fled/fled


      第三類不規(guī)則動(dòng)詞的特點(diǎn)是它們的三個(gè)主要形式都不相同:

      ring/rang/rung

      steal/stole/stolen

      arise/arose/arisen


      ⑷ 現(xiàn)在完成體的用法




      ①We can use the present perfect to talk about our experiences:

      例句:I’ve seen all the Harry Porter films,but I haven't read the books.




      ②We do not using say when something happened with the present perfect:

      例句:I‘ve been to India.(not I've been to India last year.)


      ③Use the past simple to say when something happened:

      例句:I went to India last year.




      ④ We often use ever in present perfect questions(ever=in your life):

      例句:Have you ever been to India?

               Have you ever met someone famous?


      ⑤We can use never to talk about things we have not done in our life:

      例句:She's never been to India.

               He's never met anyone famous.


      http://www.nxldzj.com/uploads/files_user49/question/5ec64705177d8154134.png


      掃碼添加“家長論壇”微信好友(微信號(hào) 16619908263

      獲取KET/PET官方真題匯總、官網(wǎng)樣卷試題、聽力閱讀答題卡、高頻必備單詞表

      咨詢北京KET PET相關(guān)課程請(qǐng)撥打電話 16619908263 (同微信號(hào))


      0 個(gè)評(píng)論

      要回復(fù)文章請(qǐng)先登錄注冊(cè)