untill和till的用法

until是till的强调形式，都表示直到某时。如果将 not until…结构放在句首，主句写成倒装。英语是一种西日耳曼语支，最早被中世纪的英国使用，并因其广阔的殖民地而成为世界使用面积最广的语言。

另外，until 可以放在句首而till则不行。我们可以说：Until they used up all their money, the young couple were very happy .我们却不可以说：Till they used up all their money, the young couple were very happy .

He didn't go to sleep until 12 last night .

他昨晚直到十二点钟才睡觉。

They didn't realize their fault till we pointed it out to them .

直到我们向他们指出了他们的错误，他们才意识到。

Not until we pointed out their fault to them did they realize it .

直到我们向他们指出了他们的错误，他们才意识到。

但是，当主句是肯定句时，它引出的意思是"直到(某时某动作停止了)" 。例如：

The students made much noise till the teacher came into the classroom .

直到老师走进教室学生们才停止了大声喧哗。

The young couple were very happy until they used up all their money .

那对年青夫妇直到花光了所有的钱才沮丧起来。