it 是形式主语that和as if引导的从句才是逻辑主语这个从句是表语从句例如：It seems that he enjoys the hustle and bustle of life in the big city. 看起来他似乎很喜欢大城市的热闹繁忙的生活.PS：我补明白你说的...那她为啥是表语从句？不该是主语从句吗？？？参见：