we heard her sing in the next room.变成被动语态

we often heard her sing in the next room 为什么动词不是ing形式的? we heard her sing in the next room.变成被动语态 改为被动语态,We ofen heard Mary sing in her bedroom. we heard her sing at the part last sunday Mary ___ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing为什么? the girl was heard to sing a song in her room by us.改同义句 we -- the girl --a song in her room . we heard them sing in shanghai 改为被动语态 she ( ) often ( )【hear】to sing in her room答案是she is often heard to sing in her room.为什么?. 把下列语句改成被动语态My mother look after my little brother.We heard her sing in the next room. we heard her sing at the party last sunday变为被动语态 we often hear her sing the song同义句转换 _____ is often heard _____ sing the song. she was often heard in her own garden in the morning. a.sing b. to sing c.singsing d.sung The girl was often heard _________ happily in her room.A.sing B.to sing C.singing D.sings I heard her ＿（sing） in the next room when I came back. I heard the girl ___(sing) in her room at this time last night. 改为被动语态：We heard him sing in his room just now we heard a girl sing in the next room just now的被动语态是什么 we heard her_____ (sing)in the next room a moment ago.