Jenny leave the hospital only six hours after the baby was b
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Jenny leave the hospital only six hours after the baby was born.
Jenny leave the hospital only six hours after the baby was born.
A.was able to B.could C .can D.is able to
Jenny leave the hospital only six hours after the baby was born.
A.was able to B.could C .can D.is able to
A.表示过去的动作.本题主要考can 和be able to 的区别.
婴儿出生6个小时后Jenny方离开那家医院.比较can 和be able to
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.
2)在否定,疑问句中表示推测或怀疑.
He couldn't be a bad man.
他不大可能是坏人.
婴儿出生6个小时后Jenny方离开那家医院.比较can 和be able to
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.
2)在否定,疑问句中表示推测或怀疑.
He couldn't be a bad man.
他不大可能是坏人.
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