对被动语态的提问比如 The room was cleaned yesterday.对yesterday提问的话,是when was the room cleaned?还是when did the room be cleaned?

对被动语态的提问比如 The room was cleaned yesterday.对yesterday提问的话,是when was the room cleaned?还是when did the room be cleaned? they don not air the the room .的被动语态 把下列句子由被动语态转变为主动语态并对主动语态的每个部分用主动语态提问,被动语态的每个部分用被动语态提问.1、Our letter are usually delivered in the morning.2、However,only one letter was delivered t we heard a girl sing in the next room just now的被动语态是什么 i saw him walk into the next room被动语态 I must clean the room.改成被动语态 They are cleaning the room now.改成被动语态 She saw them come into the room.变被动语态 The room is being cleaned,改为被动语态 the room must be kept wet.变成被动语态! He cleans the room every Sunday（改被动语态） they don`t air the room.被动语态 Someone has swept the room如何变被动语态? the room must ___(清扫)as soon as possible.被动the room must ___(清扫)as soon as possible.被动语态的用法,该如何填写? I saw the boy enter the room变成被动语态the boy（ ) ( )( ) ( )the room 对in the room提问 将下列主动语态变成被动语态:We hear the girl sing in the next room . The teacher made the bog stand outsaid the class room把这句话改成被动语态 我 非常的感谢