怎样分清英语的过去式,现在完成时和现在完全进行啊。。答:九、 现在完成时 1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态。 2.时间状语:yet,already,just,never,ever,so far,by now,since+时间点,for+时间段,recently, lately, in the past few years, etc. 3.基本结构:主语+have/has +p.p(过去分词)+...
现在完成时怎样使用?答:1.现在完成时常用的时间状语有lately,recently,just,already,yet,up to now,till now,so far,to this day,in the past few years/months/weeks/days,over the past few years,during the last three months,for the last few centuries,through centuries,throughout history等。 2.在时间状语从句中,谓语动词...