think 的否定形式有没有人称的限制 比如是he thinks not~~~还是he dosen't think~~~

he doesn't think.可以
he doesn't think the assignment was hard at all. 可以
he thinks the assignment was a piece of cake.可以
he thinks 也可以 不过加个 not在后面就不行了
he thinks the song is great. 可以
he thinks not= 不行.千万不要这样用

he dosen't think
他想那个男人是不会成功的
he dosen't think that man will sucess.

第一二人称 don't think 第三人称单数doesn't think 复数 don't think

he dosen't think......
他不认为......