She can ___,but she can’t ____ very well.A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因

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She can ___,but she can’t ____ very well.A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因

She can ___,but she can’t ____ very well.A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因
She can ___,but she can’t ____ very well.
A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因

She can ___,but she can’t ____ very well.A.sings,sing B.sing,to sing C.singing,sing D.sing,sing,如果可以请写出原因
can为情态动词,后跟动词原形,sing,同理can‘t.
选D

d 因为情态动词比如may must should can后面都是用原型的

选择D
解释:can为情态动词,其后跟动词的原形。所以即使主语是she,即第三人称单数,动词sing还是保持原形。同理,can的否定形式一样后面跟动词的原形。
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