(1)similar 指有明显的共同性质但不完全一致或同一.可以作定语也可以作表语如：A similar mistake occurs at the end of the paragraph.这一段的末尾有一个性质类似的错误.
My opinions are similar to his.我的看法与他的很相似
(2)alike作形容词或副词,作形容词时只可以作表语,意思同like
He and his brother are very much alike/like.他们兄弟俩太相似了.
A good teacher treats all his students alike.好的老师对待学生一视同仁