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九年级上册新世纪版《Unit Three Science and Technology Lesson 2 A Geography Lesson》优秀教学教案教学设计
is,am,are+动词的过去分词
3. 如果是其他时态的被动语态，什么需要随之变化？
be动词
be动词的变化
一般过去时：
was,were
一般将来时：
will be
现在完成时：
have,has been
情态动词：
can,must,should be
EMBED PowerPoint.Slide.8
1.The slaves built the Great Pyramid long long time ago.
The Great Pyramid was built (by the slaves) long long time ago.
2.The naughty boy broke the window yesterday.
The window was broken (by the naughty boy) yesterday.
3.He wrote this poem yesterday.
This poem was written (by him) yesterday.
4. Thousands of tourists visited Kunming last year.
Kunming was visited (by thousands of tourists) last year.
5. Helen tidied up her room just now.
Helen’s room was tidied up (by her) just now.
6. The teacher told White Snow in the last period.
White Snow was told (by the teacher) in the last period.