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英语语法1.(Given) the right address,we found her house easily.2.

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英语语法
1.(Given) the right address,we found her house easily.
2.(Followed by) some students,the teacher entered the hall.
我想问,为什么两句都是被动语态,第一题不用by,而第二题一定要by呢?
英语语法1.(Given) the right address,we found her house easily.2.
y 后面跟的是被动动作的行使者.第一题没有提到,所以不用by.但可以说成:
Given the right address by her,we found her house easily.
第二题有被动动作的主语:some student,所以要用.