精选优质文档-倾情为你奉上高考英语重要句型归纳总结1 be doing/ be about to do/ had done.when.（when这时强调一个动作的突然发生）1） I was walking along the river， when I heard a drowning boy cry for help2） I was about to leave when it began to rain3） I had just finished my test paper when the bell rang， announcing the exam was over2 It was （not ） + 时间段+before +一般过去时过了一段时间就It will （not ）be+ 时间段+before +一般现在时要过一段时间才会It is/ has been +时间段+ sinceIt was +点时间+ whenIt was +时间状语+ that （强调句）1） It
