present perfect tense
亲:有点多,只能缩减了.
现在完成时的结构:have/has +v-ed(过去分词)
概念:属于现在的时态,动作发生在过去,但于现在情况有关系.
以动词work为例:
肯定式
I/We/You/They have worked.
He/She worked.
否定式
I haven't worked.
He hasn't worked.
疑问式
Have you worked?
Has he worked?
带有下列时间状语
already,never,ever,always,not...yet,now,today,this month,since+具体的时间,for+一段时间
例如:I have worked here for a year.我在这里工作了一年.
I have worked here since 2009.自从2009年以来我就在这里工作了.
亲:每天都开心V_V!
thanks!