当动词think, believe, suppose, expect, imagine 后接一个表示否定意义的宾语从句时，其否定通常转移到主语：
I don't suppose that it is true. 我认为那不是真的。
I don't imagine that he will come. 我想他不会来的。
I don't think we need waste much time on it. 我想我们不必在这上面花太多时间
We didn't think we'd be this late. 我们没想到我们会到得这么晚。
I don't suppose I'll trouble you again. 我想我不要再麻烦你了。