八年级下册 Unit1

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be able to什么意思、怎么读?单词用法、记忆法、发音音标、反义词同义词辨析、释义

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be able to 音标:[bi: eibl tu:]

能, 会
  • can和be able to的用法区别

    1)can could 表示能力;可能 (过去时用could),
    只用于现在式和过去式(could)。be able to可以用于各种时态。
    They will be able to tell you the news soon. 他很快就能告诉你消息了。
    2)只用be able to
    a. 位于助动词后。
    b. 情态动词后。
    c. 表示过去某时刻动作时。
    d. 用于句首表示条件。
    e. 表示成功地做了某事时,只能用was/were able to, 不能用could。
    He was able to flee Europe before the war broke out。
    = He managed to flee Europe before the war broke out。
    注意:could不表示时态
    1)提出委婉的请求,(注意在回答中不可用could)。
    --- Could I have the television on?
    --- Yes, you can. / No, you can't。<查看详情更多>>
can/be able to

I can sing in English.我能用英语唱歌。
I won't be able to see him tobay.今天我见不着他。
<辨析>can 和 be able to 都可表示“能”,当表示现在或过去“能力所及”时,两者可通用。如:
He can( is able to) speak German.他会主德语。
I could( was able to) run very fast when I was a boy.我小时候跑得非常快。
be able to 的过去时还可以表示一种“经过努力做到了”的意思,can 的过去时则没有这种用法。如:
He started last,but he was able to catch the eight o'clock train.他出发晚了,但他努了一把力,还是赶上了8:00的火车。
can 通常只用于上述两种时态,而 be able to 还可用于将来时和完成时态。如:
He has not been able to come.他未能来。

Will she be able to take good care of her donkey, Patrick so that her parents will buy her a pony?

她是否能照顾好这只名为派翠克的小驴子,让她爸妈知道她是有能力养一只小马的呢?


If your base has a conventional airfield, it won't be able to accept heavy bombers.

如果你的基地有一个传统的飞机场,它将不能够接受剧烈的轰炸机。


I may be able to survive the poor at home?

可家里穷我能活下来吗?


You can't follow in another person's footsteps, and no one else will be able to follow in yours.

你不能跟随别人的脚步,别人也同样无法跟随你的脚步。


I am afraid I won't be able to visit you on Saturday.

恐怕我无法在星期六来拜访您了。


※Perhaps you can't control your job, but you may be able to make other changes in your life.——Alan Loy Mcginnis ,British writer或许你不能支配自己的工作,但你能够使生活发生转变。英国作家    麦金尼斯  A L
※Dancing in all its forms cannot be excluded from the curriculum of  all noble education: dancing with the feet, with ideas, with works, and ,need I add that one must also be able to dance with the pen?Friedrich W.Nietzsche, German philosopher——所有高尚教育的课程表里都不能没有各种形式的跳舞:用脚跳舞,用思想跳舞,用言语跳舞,不用说,还需用笔跳舞。德国哲学家  尼采 F  
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栏    目:八年级下册 Unit1

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