知識(shí)點(diǎn)三 be able to與can be able to與can都有“能”之意，在表示現(xiàn)在或過去“能力所及”時(shí)，兩者可以通用。

can 只用于現(xiàn)在時(shí)和過去時(shí)，而be able to則有其他時(shí)態(tài)形式。

3. (同義句轉(zhuǎn)換) I could run very fast when I was only six.

I   , run very fast when I was only six.

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五、 根據(jù)首字母提示補(bǔ)全短文。

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五、 根據(jù)句義及中文提示寫出單詞(l0分）

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