PETS-2语法讲解(29)
'一般现在时的用法 1) 经常性或习惯性的动作,常与表示频腮度的时间状语连用。时间状语:every…, sometimes, at…, on SundayI leave home for school at 7 every morning. 2) 客观真理,客观存在,科学事实...'
PETS-2语法讲解(27)
'begin(start) doing/to do begin/start to do sthbegin/start doing sth. 1)谈及一项长期活动或开始一种习惯时,使用doing.How old were you when you first started playing the piano?你几岁时开始弹钢琴?...'
PETS-2语法讲解(17)
'一般现在时表将来 1)下列动词:come, go, arrive, leave, start, begin, return的一般现在时表将来。这主要用来表示在时间上已确定或安排好的事情。The train leaves at six tomorrow morning.When does the ...'
PETS-2语法讲解(11)
'一般过去时的用法 1)在确定的过去时间里所发生的动作或存在的状态。时间状语有:yesterday, last week, an hour ago, the other day, in 1982等。Where did you go just now? 2)表示在过去一段时间内,经常...'