变被动语态,I heard Jane playing the piano in her room.(*^o^*)答案写的是Jane was heard playing the piano in her room.可老师讲的是：一些使役动词和感官动词用不定式作宾补,这时不定式要省略to,但变被动语态时
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变被动语态,I heard Jane playing the piano in her room.(*^o^*)答案写的是Jane was heard playing the piano in her room.可老师讲的是：一些使役动词和感官动词用不定式作宾补,这时不定式要省略to,但变被动语态时
变被动语态,I heard Jane playing the piano in her room.(*^o^*)
答案写的是Jane was heard playing the piano in her room.可老师讲的是：一些使役动词和感官动词用不定式作宾补,这时不定式要省略to,但变被动语态时必须加上to.好纠结啊...我认为应该是：Jane was heard to play the piano in her room.
变被动语态,I heard Jane playing the piano in her room.(*^o^*)答案写的是Jane was heard playing the piano in her room.可老师讲的是：一些使役动词和感官动词用不定式作宾补,这时不定式要省略to,但变被动语态时
为你解答.
I heard Jane playing the piano in her room.（变被动语态）
Jane was heard playing the piano in her room.
Jane被听到正在她的房中弹琴.
解释：这道题的答案没问题.你老师说的是另一种情况,hear sb do sth,听到某人做了某事.该短语变为被动时,要补上不定式的to,即be heard to do.
但这句是hear sb doing,听见某人正在做,用的是现在分词doing,而非不定式.不要把这两个表达混在一起了.