求完成：用if...not或unless改写句子they won't know the truth if you don't tell themyou will hurt your eyes if you don't take a rest after using computers for a long timewe will be late for the meeting unless we take a taxi therey

求完成：用if...not或unless改写句子they won't know the truth if you don't tell themyou will hurt your eyes if you don't take a rest after using computers for a long timewe will be late for the meeting unless we take a taxi therey not if与unless 区别 句子中什么时候用unless什么时候用 if not 用unless=if not 造句 2个 用unless=if not 造句 2对 We will not attact unless we are attacked if attacded为什么用unless if...not和unless怎么转换 unless 和 if not怎么互换? if not 和unless有什么区别 求教：用If...not 或 unless改写句子.you will catch a cold unless you on your coatunless you return the book to the library.you are not able to borrow more bookswe will not have clean water if we do not prtect the earthunless you study hard.yo unless until if. notunless until if. not 区别用法 unless 与if not帮我分析一下例句：I'll be surprised if he doesn't have an accident.（这句可以用unless来换么?为什么）I'll be back tomorrow unless there's a plane strike.(为句可以用if not来换么?为什么）unless=if not, if或unless引导的条件状语从句应该用什么时态啊 【英语语法】Unless 和 If not 能互换吗? 英语题求解答,She tells me ?my pictures are good or not. a: whether b: that c:if d:unless为什么是 if ,添 whether 不行吗? small sailboats can easily turn over in the water_____?A.if not managed carefullyB.if are not managed carefullyC.unless not managed carefullyD.unless are not managed carefully I will come----- Idon not change my mind a.if b.if not c.unless d .until为什么 这里的,not unless