Credit: Baidu 主语从句(Subject Clause) 在复合句中充当主语成分的句子叫做主语从句. (1)That he finished writing the composition in such a short time surprised us all. (2)Whether we will go for an outing tomorrow remains unknown. (3)Who will be our monitor hasn't been decided yet. (4) Whom we must study for is a question of great importance. (5)What caused the accident remains unknown. (6)Whatever you did is right. (7)Who the watch belongs to was lost is unknown. (8)What we need is time. (9)What we need are good doctors. 小结: (1)引导主语从句连词有that,whether,who,what,whatever等 (2)连词位于句首不能省略 (3)主语从句大多数情况下视为第三人称单数,但也有例外,如例(9)