be able to与can 能.会  (be able to用于各种时态.而can只能用于一般现在时态和一般过去时态中,have to用于各种时态.而must只能——青夏教育精英家教网—

摘要： be able to与can 能.会  (be able to用于各种时态.而can只能用于一般现在时态和一般过去时态中,have to用于各种时态.而must只能用于一般现在时态)例如: 1.I have been able to/will be able to speak two languages.

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找出与划线部分意思相同或相近的选项。

Now, I am able to swim.

[ ]

A. be able to
B. can
C. could
D. was able to

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Don’t worry. All the children will_____ arrive at school on time tomorrow.

A. are able to B. can C. be able to D. can be able to

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I'll ________ speak English in one year.

A. be able to

B. can