1.The girl was often heard ( ) happily in her room.（09 泰安）

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1.The girl was often heard ( ) happily in her room.（09 泰安）
A.sing B.to sing C.singing D.sings 选C,为什么不选B?
2.Your car needs （）.
A.repaired B.repairing C.to repair D.being repaired
这题选B,为什么不选C
3.The People's Republic of China （）on Oct.1,1949.
A.found B.was found C.is founded D.was founded
选D,难道found与find的过去式found不一样吗?为什么不是C

1.hear sb doing sth、不用不定式、这里为被动语态、不是过去进行时、而是现在分词doing作宾语补足语.
2.need doing=need to be done、选C要变成to be repaired.
3.found的过去式是founded、建立成立的意思.find的过去式是found.中华人民共和国建立在1949年10月1号、因此用一般过去式的被动语态.

1.The girl was often heard ( ) happily in her room.（09 泰安） The girl was often heard ( ) happily in her room. The girl was often heard _________ happily in her room. The girl was often heard _happily in her room. the little girl was heard _______(laugh) happily in the room 将We often hear the girl sing happily in her room改为被动语态 The girl is often heard _______ in the next room. The girl is often heard ___ in next room The girl is often heard ____ (to sing / singing )happily in the girl was heard to sing a song in her room by us.改同义句 we I often hear the lonely girl sing in her room I often heard () (sing) in the room