一个英语问题3.He had never praised him ___ he became one of the to
一个英语问题
3.He had never praised him ___ he became one of the top students in his grade.
A unless B until 选哪个?原因?
3.He had never praised him ___ he became one of the top students in his grade.
A unless B until 选哪个?原因?
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1. 如果选A unless=if...not...,则此句为：He had never praised him if he didn't become one of the top students in his grade.
if引导的从句如果出现过去时,则为虚拟语气,而该句时态又无法前后对应,所以用unless不妥.
2. 答案选B.
此句为隐含的not...until...句型,因为never具有否定的意味.
翻译成： 直到他成为了班上成绩最拔尖的学生之一,（另一个）他才开始表扬他.
“不表扬他”在“他成为拔尖学生之一”之前一直没有发生,所以用过去完成时.
if引导的从句如果出现过去时,则为虚拟语气,而该句时态又无法前后对应,所以用unless不妥.
2. 答案选B.
此句为隐含的not...until...句型,因为never具有否定的意味.
翻译成： 直到他成为了班上成绩最拔尖的学生之一,（另一个）他才开始表扬他.
“不表扬他”在“他成为拔尖学生之一”之前一直没有发生,所以用过去完成时.
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