The girl was often heard _________ happily in her room.A.sing B.to sing C.singing D.sings

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The girl was often heard _________ happily in her room.A.sing B.to sing C.singing D.sings
The girl was often heard _________ happily in her room.
A.sing B.to sing C.singing D.sings

The girl was often heard _________ happily in her room.A.sing B.to sing C.singing D.sings
hear sb doing sth
这是固定搭配,而该题是被动语态,可以被改写为sb.often heard the girl singing happily in her room.所以选C

B.to sing
被动,hear/make/see等词在被动中要补回to

be heard donging something 这是固定语法搭配

选择B!
从题干可以看出是The girl was often heard那个女孩经常被听到高兴地在她房间里唱歌。
属于被动语态,在被动语态中,所有do的形式都要还原成to do不定式.
所以是 was heard to sing!
给你个列子
my teacher made me do a lot of homework
I was made to...

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选择B!
从题干可以看出是The girl was often heard那个女孩经常被听到高兴地在她房间里唱歌。
属于被动语态,在被动语态中,所有do的形式都要还原成to do不定式.
所以是 was heard to sing!
给你个列子
my teacher made me do a lot of homework
I was made to do a lot of homework by my teacher.
懂了吧?

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