Question

--Was his father very strict with him when he was at school?--Yes. He had never praised him

--Was his father very strict with him when he was at school?--Yes. He had never praised him ________ he became one of the top students in his grade. (Unit7-5)A. after　B. unless　C. until　D. when
B为什么不对，，讲讲区别，谢谢大佬们了

Answer 1

神啊，答案是C 啊。"never"里暗含着not ，本题意欲考察对 not ...until 句型的掌握 。整个对话的汉语意思大概是：-----他在学校上学的时候他爸爸对他要求严吗？-------嗯，直到他成为了年级里的尖子，他爸爸才表扬了他（暗含意思就是之前从未夸过他）。请采纳……

追问

大哥，也有Not unless。。。 dont come in unless you will be invited

追答

如果用unless的话，前后时态要保持一致，大概是这样。你说的这个情况也对（Don‘t come in unless you will be invited），在这里它是个祈使句（除外了）；再一个就是按意思了，看哪个翻译出来较通顺，符合英语的说话习惯。。平时多读读，形成语感就好了，希望能够帮到你……

Answer 2

B 引导条件状语，时态前后一致，而此处两个句子时间有先后之别

Answer 3

c?
not until...直到..才

追问

unless除非呢？

追答

句子里He had never praised,用的完成时，
用UNTIL时态不符，用UNTIL前面可以用成He never praised him,过去式。
其他选项就更不对

Answer 4

vB 引导条件状语，时态前后一致，而此处两个句子时间有先后之别