It + 不及物动词 + 从句
(1) It seems that
例：It seems that Alice is not coming to the party at all.
看来Alice根本就不准备来参加聚会了。
(2) It happened that...……很偶然.
例：It happened that I won the football lottery last week.
我上星期偶然中了足彩
(3) It occurred to sb that...
例句：It suddenly occurred to me thatI knew how to solve that problem.
我突然想起我知道怎样解决那个问题.
(4) It appears that....
例： It appears that Tom might change his mind.看来汤姆会改变主意