英语被动语态分不清楚什么时候用下列的组合,例如 repaired be repaired been repaired b

need repaired和need to be repaired 的区别 把下列主动语态的句子改写成被动语态的句子.Someone has repaired the car. They have repaired many chairs today.怎么改为被动语态 The mechanic repaired the bicycle yesterday.改为被动语态 my father repaired my bike just now变被动语态 Has the Tv set ____?A repaired B been repaired C repairing D My pen needs___ A.repairing B to be repaired C repaired D bo fixed与repaired的区别 把“The computer hasn't been repaired by the work .”改为主动语态 Your bike needs to be repaired it is already been repaired中为什么是been,而不是be 英语完成时和被动语态什么时候用被动语态 什么时候完成时、被动语态动词前加be/been