英语问题:appear to / seem to 什么时候需要to什么时候不需要to? 下面2个例句

Question

下面2个例句:
It appeared to me that he was satisfied with the answer.
It seems that something is wrong with the machine.

为什么1句要to,而2句不需要to呢?它们有何区别?

Answer 1

为您解答
直接接句子需要that
接对于谁来说。。。接
其实接的都是that，但只不过插入了一个对象to sb 在that前面而已。