英语核心词汇详解happen, take place, occur辨析.docx
英语核心词汇详解Mppen, take place, occur辨析 happen, take place 与 occurhappen是不及物动词,作发生解时,可指偶然的事故,多 用于客观事物情况的发生,也可指有计划或无计划发生的事。一 般以事件、环境、形势等作主语,表示某人发生某事时,须 以介词to引出某人"。如:The accident happened at 5 o'clock.事故发生在五点钟。Whatever has happened to your arm? It' s all swolleno 你 的手臂怎么了?肿得好厉害。occur基本意思是呈现在视野、思想、意识中,指有计划地 使某些事“发生,有时强调“呈现于人的知觉中。 occur常与 介词to连用,意为发生 想起等。occur 一般只用作不及物动词,含有“出乎意料的意味,不可 用于表达意料之中或计划之中的事情,也不与suddenly连用。Did it occur to you to phone them about it?你难道没想到就 这事给他们打个电话?当具体事物、事件作主语时,happen和。ccur可以通用。如:The accident happened/occurred yesterday0 事故是昨天 发生的。The earthquake occurred/happened at dawn.地震发生在黎 明时分。take place指事件发生,但常用来表示举行的意思,带有非偶 然性,其后面一般不跟to sb./sth.指必然会发生的事情时,多 用 take place.例如:The meeting took place last night.会议昨晚举行。Great changes have taken place in China.中国发生了翻天覆 地的变化。引导时间状语从句的连词:when, while, as, before, after, until, till, as soon as, since等。时间状语从句和主句的时态 关系为:主句将来时从句现在时,主句过去时从句过去时。1. before意为“在之前You must finish your homework before your father comes back.2. after意为在之后,与before是反义词The boys will go to the cinema after they have their dinner.3. when意为“当的时候。谓语动词既可以是延续性动 词,也可以是非延续性动词。表示从句的动作发生在主句的动作 之前,之后,也可以同时发生。His mother was cooking dinner when he got home.When I get home, I always do my homework first.当我至U家 时,我经常先做作业。(到家在前,写作业在后。)While意为“正当时;正在时。在while引导的 从句中,谓语动词必须是延续性动词,表示从句动作和主句的动 作同时发生。Please don' t talk so loud while people are reading.He fell asleep while/as he was watching TV.他看着电视睡着了。As Millie sat down on the sofa, Amy came into the room. 米莉坐在沙发上时,艾米走进了房间。4. . as表示从句动作和主句的动作同时发生,引导的从句中既可 用延续性动词,也可用短暂性动词。As I was walking along the bridge, my mobile phone rang. 当我沿着桥走的时候,我的手机响了。1、s。意为因此,所以,后面接的句子表示结果We didn' t have any money for a taxi, so we walked back to the hotel.【注意】because和so不能同时出现在一个句子中。2、for意为“因为、由于,后面的分句通常表示一种推断性 的原因,是对前一分句的补充。此时for连接的句子不能放在句日OJack likes reading this book for it' s interesting and educational.杰克喜欢这本书,因为它有趣而且有教育意义。【辨析】for和because的区别for连接的句子只能放在句尾,前面经常用逗号隔开,对结果表 示补充说明或提供推断的理由。because表示是一种明确的因 果关系,解释原因,既可放在主句前,也可放在主句后,常用于 回答why引导的问句。Paul must be at home, for the light in his room is still on.He was late because he didn' t catch the school bus.1、or意为“或者。用来连接两个或多个单词、短语或句子, 两者选其一。My father never smokes or drinks.我爸爸从不吸烟或喝酒。Do you go to school by bike or on foot?你上学3奇自行车还 是步行?【注意】作连词,还可表示否则,要不然,用在祈使句 后构成“祈使句+。+陈述句相当于"If you don' t.f you' H.Hurry up, or you' II be late.快点,否则你要迟到了。2、“eitheror意为要么要么”或者或 者."不是就是”表示选择either.or连接两个主语时,谓语动词应当与or后面的主语在 人称和数上保持一致。(就近原则)They may either stay here or go with us.他彳门呆在这里也彳亍, 跟我们去也行。Either his parents or his uncle is going to Shanghai.他的父 母和他的叔叔都要去上海。3、notbut的用法不是而是。连接主语,谓 语动词的单复数形式要根据but后的主语而定。(就近原则)We got it wrong. It was not the green one but the blue one.我们弄错了,不是绿色的而是蓝色的。1、表示转折关系-but,意为“但是,然而,可是,连接两个句 法作用相同的单词、短语或句子。The man was so tired, but he still went on working.这位男 土很累了,但是他还是坚持工作。Be happy, but never satisfied.要快乐,但永远不要满足。(李 小龙 Bruce Lee )2、While表示转折时,意为“而,然而,往往连接两部分内 容或结构形成鲜明的对比。I am good at English while my sister is good at maths.我擅 长英语,但是我姐姐擅长数学。Sally likes red while Jenny likes white.萨利喜欢红色但是珍 妮喜欢白色。3、yet意为“而,然而,常连接句子,表示惊讶或转折。She said she would be late, yet she arrived on time.她说白也 会迟到,然而她按时到达了。Tom was usually so careful, yet this time he made a small mistake.汤姆通常非常认真,然而这次他犯了一个小的错误。