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必修4《Grammar》公开课PPT课件优质课下载
Mark Twain wrote this book.
What is the man doing?
He is feeding a dog.
= A dog ___________ by him.
is being fed
读下面的句子, 总结各种时态被动语态的构成形式。
1. Our teachers are respected by us.
2. He will be visited by me.
3. Paper was first invented in China.
4. They really have been poorly paid.
5. Production costs had been greatly reduced.
6. A new railway is being built.
7. The roads were being widened.
Tense
The Passive Voice
一般现在时
一般过去时
一般将来时
现在进行时
过去进行时
现在完成时
过去完成时
am, is, are +过去分词
was, were +过去分词
shall, will +be+过去分词