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 。
【seem用法】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 。