表示一直做某事时doing和havedone有什么区别?Iammakingasurveyrecently.最近我一直在做一项调查.Iwaspreparingfortheexaminationthewholeweek.一整周我一直都在准备考试.Thepeoplehadlivedapoorlifesinceth

Question

表示一直做某事时doing和have done有什么区别?
I am making a survey recently.
最近我一直在做一项调查.
I was preparing for the examination the whole week.
一整周我一直都在准备考试.
The people had lived a poor life since the war broke out.
自从战争爆发以来,人们一直过着贫困潦倒的生活.

Answer 1

这实际是进行时和完成时的区别.
“I am making a survey recently.最近我一直在做一项调查
I was preparing for the examination the whole week. 一整周我一直都在准备考试.”
这两个句子强调的是正在发生的动作,没有说出所做动作的影响.
而“The people had lived a poor life since the war broke out.自从战争爆发以来,人们一直过着贫困潦倒的生活.”这句话传达的意思是：人们已经对贫困潦倒的生活不堪重负,不能再这样下去了.（如果有上下文,理解要按上下文）这正是现在完成时的基本功能.