UC知道unless和untill的区别
来源：百度知道 编辑：UC知道 时间：2024/06/24 05:39:34
unless和untill的区别是什么呢?
如下面这道题:
--Was his teacher very strict with him when he was a school?
--Yes.He had never praised him___he became one of the best students in his grade.
A.after B.unless C.untill D.when
(答案是C)
如下面这道题:
--Was his teacher very strict with him when he was a school?
--Yes.He had never praised him___he became one of the best students in his grade.
A.after B.unless C.untill D.when
(答案是C)
untill unless区别在于前者是强调时间，后者强调条件，
首先从字面意思上理解，unless是除非，如果不，要是不，until是直到..才
然后就是一般用法的问题了，until 一般用于完成时，而此题很明显只是一个强调性的句子，所以应该选A
题中有never 组成词组not until 得变形
没错，选C
从语意上讲B、C都对，但从时态上讲，就只有C了，过去完成时表示老师从没表扬过他，因此C就适合。
如果用B，前面主句用过去将来时比较合适。