桌面百度加速器还有么:till 和until 用法有哪些不同

来源:百度文库 编辑:杭州交通信息网 时间:2024/04/28 11:35:03

有。,till和until都可以用作连词和介词,用于肯定句和否定句。用于肯定句时,只与持续性动词连用,有一个not...until的形式是固定的表示"到...为止"。用于否定句时,通常与瞬间动词连用,也可与持续性动词连用,表示"直到...才"的意思。这两个词一般情况下可以相互换用。例如:
We waited for him until/till six o'clock. 我们等他到一直等到六点钟。
The pupils will not begin the meeting till/until their class supervisor comes. 学生们等到班主任一到就开始开会。
They didn't talk until/till the interpreter came. 直到译员到,他们才交谈。
He did not go to bed until/till he had made sure that nothing was wrong with the pipes. 他检查水管,确准它们没有毛病,才去睡觉。
当until用于句首时,一般不能用till代替。在以not开始的从句或短语里,till一般也不可代替until,而且这种句式要用倒装语序。例如:
Until the last minute of the match we kept playing. 直到比赛的最后一分钟,我们仍然坚持奋战。
Not until he had finished his work did he go home. 他直到把工作做完,才回家去。

基本没区别