the room needs to be big enough for three people物是主语不应该是need doing吗?

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the room needs to be big enough for three people物是主语不应该是need doing吗?
the room needs to be big enough for three people物是主语不应该是need doing吗?

the room needs to be big enough for three people物是主语不应该是need doing吗?
你说的应该是The room need cleaning.这种用法.这里clean 与room是被动关系,房间时被打扫的.这句等于the room need to be cleaned.
你问的这个句子,room 和be big enough是主动关系.所以就用need to be big.

need doing 是被动语态
比如说: the table needs cleaning=the table needs to be cleaned.

need做实义动词的时候,后面接to do sth.而不是doing sth.