We have heard him sing改为被动语态.He ____ ____ ____ ____ ____ by us.
题目
We have heard him sing改为被动语态.He ____ ____ ____ ____ ____ by us.
hear 后面不是不可以加to do 不定式吗,请注意要填五个空!
答案
has been heard to sing 被动语态时"to do"是要还原的
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