PETS-2语法讲解(33)
'不定式的特殊句型so as to 1) 表示目的;它的否定式是so as not to do。Tom kept quiet about the accident so as not to lose his job.汤姆对事故保持沉默是为了不丢掉他的工作。Go in quietly so as not to...'
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(26)
'mean to doing/to do mean to do 打算、想mean doing 意味着 I mean to go, but my father would not allow me to.我想去,但是我父亲不肯让我去。 To raise wage means increasing purchasing power.赠加...'