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主语+ be + 过去分词
be 有人称和时态的变化。
被动语态的构成
主语+be+过去分词+by sb
在被动语态的句子中, 如果我们需要指出动作的执行者, 可以由by引出。
The hill is very beautiful.
It __________(climb) by the boy
every day.
is
climbed
Practice
How delicious the meat is!
It _____________(eat) too much yesterday.
was eaten
Most of us like watching TV.
TV _________________( watch) too much
by us.
is watched
He ate the apple for last lunch.
The apple __________ (eat) by him last lunch.
was eaten
1._____ a new library _____ in our school last year?
A. Is; built ?B. Was; built ??
?? C. Does; build D. Did ; build
2. Cotton（棉花） ____ in the southeast of China.
A. is grown ? B. are grown C. grows D. grow
3.So far, the moon ____ by man already.
A. is visited ?B. will be visited ?
?C. has been visited ? D. was visited
Choose the best choice