亚洲欧洲国产欧美一区精品,激情五月亚洲色五月,最新精品国偷自产在线婷婷,欧美婷婷丁香五月天社区

      各地
      資訊
      當前位置:考試網(wǎng) >> 英語四級考試 >> 詞匯語法 >> 模擬試題 >> 2017上半年英語四級考試必備語法知識

      2017上半年英語四級考試必備語法知識(5)

      考試網(wǎng)   2017-06-08   【

        形容詞able的用法說明:

        1.表示“有能力的”、“能干的”,可用作表語或定語。如:

        He is an able manager. 他是位有能力的經(jīng)理。

        He is old but still able. 他雖年老,但仍有很能干。

        2.用于 be able to do sth(能或會做做某事)。如:

        He is able to speak English. 他會說英語。

        Everyone here is able to type. 這兒的每一個人都會打字。

        He will be able to get about in a week or two. 再過一兩個星期左右他就能走動了。

        He studied hard and was able to pass his examinations. 他學(xué)習(xí)很努力,所以考試及了格。

        注:be able to 不僅有多種時態(tài)形式(通常不用于進行時或與 be going to 連用),而且還可以與某些情態(tài)動詞連用(通常不與 can 連用),甚至還可以有非謂語形式。如:

        Since his accident he hasn't been able to leave the house. 自出事之后,他一直未能離開家。

        You might be able to persuade him. 你也許能夠說服他。

        I hope to be able to do the work. 我希望能干得了這項工作。

        I regret not being able to help her. 我很遺憾未能幫助她。

        3.able 的比較級和最高級通常是abler和ablest,也可以是more able和most able,有時還可用 betterable和best able.如:

        You are better able to do it than I (am). 你比我更有能力做這件事。

        She's the person best able to cope. 她是個最能妥善處理問題的人。

        4.若要加強語氣,其前除可very,quite,perfectly等修飾外,有時還可用well修飾。如:

        He is quite [well] able to take care of himself. 他完全有能力照顧自己。

        He's a very able student; he's just too lazy. 他是個很有能力的學(xué)生,只是太懶了。

        若受just,only just修飾,則表示“只能”“僅能”。如:

        I was just able to make out a dark figure in the distance. 我只能看見遠處有個黑影。

        5.able的反義詞是unable(不能的,不會的),不是disable,后者是動詞,其意為“使殘廢”“使無能力”。比較:

        They were unable to reach a decision. 他們沒法做出決定。

        Now that he was disabled, his house had become a prison to him. 因為他殘廢了,他的房子就成了他的牢籠。

      糾錯評論責編:Aimee
      相關(guān)推薦
      熱點推薦»