am not, aren't, isn't, can't, don't doesn't

am not, aren't, isn't, can't, don't doesn't
这些词分别在上面情况下使用,麻烦懂的说明下.
he likes coffee，but i don‘t
she likes tea,but he doesn't
he is eating some bread,but she isn't
she can type very well,but he can't
they are working hard,but we aren't
he is reading a magazine,but i am not
为什么这样用，请说详细点说，还搞不懂怎么用