作业帮题目解析(从属连词unless的用法)
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---Was his father very strict with him when he was at school? ----Yes.He had never praised him ______he become one of the top students, in his grade. 为何填unless不对?(请详细解答)
解题思路： unless表"除非",强调条件,引导条件状语从句
解题过程：
作为从属连词含义不同,引导从句性质不同 请看下面几句:
1. I didn't know the news until my teacher told it to me.
2. I couldn't know the news unless my teacher told it to me.
3.-Was his father very strict with him when he was at school?
-Yes. He had never praised him until he became one of the top students in his grade.
析:句1动词didn't know表明该句强调时间的延续,表"我不知道这消息"的状态一直延续到"老师告诉我",因此应用until引导时间状语从句。句2动词couldn't know表明该句强调条件,表"我不可能知道这消息,除非老师告诉我",因此应用unless引导条件状语从句。句3表明"他爸爸从来没有表扬他"的状态一直延续到"他变成年级最好的学生之一",until表"直到",强调时间的延续,引导时间状语从句,因此应用until.
最终答案：略
解题过程：
作为从属连词含义不同,引导从句性质不同 请看下面几句:
1. I didn't know the news until my teacher told it to me.
2. I couldn't know the news unless my teacher told it to me.
3.-Was his father very strict with him when he was at school?
-Yes. He had never praised him until he became one of the top students in his grade.
析:句1动词didn't know表明该句强调时间的延续,表"我不知道这消息"的状态一直延续到"老师告诉我",因此应用until引导时间状语从句。句2动词couldn't know表明该句强调条件,表"我不可能知道这消息,除非老师告诉我",因此应用unless引导条件状语从句。句3表明"他爸爸从来没有表扬他"的状态一直延续到"他变成年级最好的学生之一",until表"直到",强调时间的延续,引导时间状语从句,因此应用until.
最终答案：略