On的用法小结.doc

On的用法小结一on 的用法 表示一个正在进行的动作，后接由动词转化来的名词。例如：on a visit 在参观访问 on the flow 在涨潮 on the turn 在转折点 on the watch 警戒 on strike 在罢工例句：王先生去纽约出差。Mr Wang went to New York on business她去悉尼进行两周旅行。She was away to Sydney on a twoweek trip.他来日本访问。He had come on a visit to Japan. on表示“一就”,后接名词、代词或动名词，相当于as soon as .例句：我们一到他就接见了我们。He met us on our arrival.一接到她来信我就给你写信。Ill write to you on hearing from her.他从英国一回来，就认真地投入工作。On his return from England he set to work seriously.一想到它，我决定不去了。On thinking about it , I decided not to go.二表示”一就.“的用法归纳1.on+名词、动词的ing形式On entering the room, she found the man lying dead on the floor.一进入屋子她就发现那个男的躺在地上死了。He went directly to the hotel on reaching the town.一到那个镇他就直接去了旅馆。Youfeelemptyandsickatthethoughtofnot beingtogether.只要想到不能在一起，你就会感到空虚、难受。2.the +名词（minute, moment, instant，second，time）例如：他一到那个国家，就开始寻找。来The moment he reached the country, he started his search. I gave him the moneythe momentI saw him.我一见到他就把钱给他了。The minuteI saw him I knew that there was no hope.我一见到他就知道没有希望了。He promised to attend itthe instanthe reached the office.他答应一到办公室就去参加。The secondhe spoke we recognize his voice.他一说话我们就听出了他的声音。【注意】和引导的从句一样，从句常用一般时态。Tell him I need to see him the minute hearrives.3. immediately/instantly /directly引导的时间状语从句。钟一敲十二点我就离开了。I left immediately the clock struck twelve.她一定是一到家就写的She must have written it immediately she got home.【注意】immediately/instantly /directly等除了作副词还可做连词。4. as soon as和once“as soon as”是“一就”最普通的表达方法，引导时间状语从句。The boy couldnt help cryingas soon ashe saw his mother.这个男孩一见到他母亲就禁不住大哭起来。I will let you know about itas soon aswe come to any conclusion.我们一得出结论就会告诉你的。once作为时间状语的连词，常常隐含条件，意为“一旦就”，如：Once he has made up his mind, nothing can change his mind.5. “hardly (或scarcely/rarely)when（或before）” 1)作“刚就”解，注意hardly和scarcely位于句首时，有主、谓语颠倒现象：(1). Hardly had I reached the station when (或before)the train started.我刚到车站，火车就开了。(2). Scarcely had he opened the door when(或before)a gust of wind blew the candle out.他刚开门，一阵风就把蜡烛吹灭了。注意：使用本句型结构时必须注意下列三点：（1）scarcely或hardly所在的主句内，谓语动作发生在when或before从句内的谓语动词之前，因此主句用过去完成时，从句用过去时。（2）若hardly或scarcely位于句首，则后面主语和助动词词序要颠倒。（3）不能用than代替句中的when，若非要用than，则必须改用“no soonerthan”句型。下列几种表示式的句意相同：a）He had scarcely (或hardly) seen the letter when (或before) he started back home.他一见到信就动身回家了。b）Scarcely (或hardly) had he seen the letter when（或before）he started back home.（译文同上）c）He had no sooner seen the letter than he started back home. （译文同上）d）No sooner had he seen the letter than he started back home. （译文同上）e）He started back home as soon as he saw the letter.(=As soon as he saw the letter, he stated back home.) （译文同上）注：用as soon as 时，主句和从句的时态通常一致，但从句不用将来时，因它是时间从句。练习题：2011年高考英语题29. He had no sooner finished his speech