CNN news 2010-04-11 加文本
unless until
unless与until均为从属连词,unless表"除非",强调条件,引导条件状语从句;until表"直到",强调时间的延续,引导时间状语从句。
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",因此也应用until引导时间状语从句。
2.On behalf of the American people, we're frustrated by the remarks.
on behalf of为了…的利益
例句:He spoke on behalf of the plan.
他为这项计划辩护。
代表…
例句:At the airport he read an address of welcome on behalf of the association.
在机场上他代表该协会致了欢迎词。