时间状语:ago, yesterday, the daybefore yesterday, last week(year, night, month…), in1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
①瞬间动词用于“一段时间 + ago”的一般过去时的句型中;②瞬间动词可改成与之相对应的延续性动词及短语,与一段时间连用;③瞬间动词用于“It is + 一段时间 + since + 一般过去时”的句型中,表示“自从……以来有……时间”的意思,主句一般用it is来代替It has been;④瞬间动词用于“Some time has passed since + 一般过去时”的句型中。请看:
A. He joined the Leaguetwoyears ago.
B. He has been in theLeaguefor two years.
C. It is two years sincehejoined the League.
D. Two years has passed sincehejoined the League.
二.一般现在时与现在进行时的转换
在一般现在时中,at加上名词表示“处于某种状态”,如at work(在工作), at school(上学、上课)等。此短语可与进行时态转换。请看:
Peter is at work, but Mike is at play.
Peter is working, but Mike is playing.
三.现在进行时与一般将来时的转换
在现在进行时态中go, come, leave,start, arrive等动词常与表示将来的时间状语连用表示将要发生的动作。如:I am coming,Mum! 意为“我就来,妈妈!”请看: