1、(to sb) (to be) sth | ~ like sth，不进行时，涉及推断时用，意思像，似乎，看来。

例句：You seem happy.你看起来很高兴。

2、to+动词的不定式 ，用以缓和语气时用，意思为感到好像，觉得似乎。

例句：I seem to have left my book at home.我大概是把书忘在家里了。

3、it seems | it would seem，表示不确切或客气时用，意思为看来好像，似乎。

例句： It would seem that we all agree.我们大家似乎都同意。