1.I think是插入句,可看作与其他部分无关: I wish you were here, then I think I should not feel like this.
2.母句中添加情态动词can t mustn t wouldn t时: I can t believe that they are married. You mustn t think he s stupid. I wouldn t have imagined that Sandra would be here.
3.由于cannot helping, ought not, need not, not at all等短语的关系而把I think! 隔离。
I should have thought sometimes you couldn t help thinking of the past.
I think you ought not to walk at night alone, Mrs. Moore.
I think you need not be impolite to her, as well as to her son.
"I think the angel are not at all in heaven." Mr.Esmond said."
4. 由于not just... but, just not... enough,not much, not quite等以not为核心的副词短语的影响,也不便 把否定拿到动词的前面去:
I think I m just not smart enough to make any sense out of for you.
"You think she s not much like you? Brerald asked.
But I think that Elizabeth was not quite so certain of it as I.
句中含有no, never, nothing, nobody等的不定词时: I should think you never have seen many. I thought it explained nothing.