题目
has been doing 表示从过去一直到现在,那么它的被动态是什么呢
提问时间:2020-12-16
答案
He has been studying this book for more than two years.
This book has been being studied for more than two years
have/has been being + done
This book has been being studied for more than two years
have/has been being + done
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