镇魂街实力级别:完成时的标志有哪些?

来源:百度文库 编辑:大学知道 时间:2019/10/20 00:12:05

现在完成时
表目前已完成的动作,强调对现在的影响。时间是算到你说话的时候为止,而且现在完成时有一些标志性的时间状语:
1.for+时间段;I have learned English for ten years.
2.常见的副词:lately;recently, just,up to now, till now,
so far, these days,
in the past few years/months/weeks/days
3.注意:for+时间段;since+时间点
They have lived in Beijing for five years.
They have lived in Beijing since l995.
4.This is the first time that I have watched stars through a telescope.
第几次做某事,后面跟现在完成时。