to know
sb.seems to do sth.// to be+名词/形容词/副词/介词短语（表示现在的动作或存在的状态）
sb.seems to be doing sth.（表示正在进行的动作）
sb.seems to have done sth.（表示已经发生的动作） 例如：
He seems to know everything.他好像什么都懂.
She seems to be in hospital.她好像住院了.
They seem to be watching TV.他们好像在看电视.
You seem to have finished your homework.你好像做完作业了.