perhaps能与could have done连用吗?

问题描述:

perhaps能与could have done连用吗?

不能,语义重叠.原题是中有两个选项我很纠结,一个是could have done,一个是could be done,答案说选后者,因为前者是完成体,与perhaps矛盾,可能是题不好吗?你把完整的题目贴出来吧,大家给看看。