一些特殊连词的用法课件PPT.ppt

如何掌握一些特殊连词的用法？玄武高级中学梅园校区 章磊2021/8/261 由于受母语句子结构与逻辑关系的影响，学生常常把because和so连用、although和but连用英语中because和so、although和but为什么不能连用？两个分句之间用because连接和用so连接、用although连接和用but连接在句法功能和语义上有什么差别？Unless在句子中该如何使用呢？2021/8/262 连词中的从属连词包括引导各种状语从句（包括时间、地点、原因、目的、结果、条件、让步状语从句）的引导词（如when, before, until, where, wherever, because, as, since, so that, in order that, so … that, if, unless, although等）2021/8/263一、Because的用法 例句：Because he stayed up last night, he felt sleepy in class.because 的中文意思是因为，用来连接两个句子，because 既可以放在句首的位置，也可以放在后面。

2021/8/264例：1. I stayed at home yesterday evening because it rained.　= Because it rained, I stayed at home yesterday evening. 2. Tom went to bed very late last night because he had a lot of homework.　= Because he had a lot of homework, Tom went to bed very late last night.2021/8/265Because句型中的常见错误：1. 因为我没有钱，所以我昨晚就没买那本书了2. 因为他要看篮球赛，所以我们就和他一起去上述两句例句，对我们来说，是百分百正确的句子，但在英文来说，却是错误的 在英语中，若选择用because,就不要用so;反之，若选择用so,就不要用because2021/8/266上述句子可以说成：1. Because I had no money, I didn't buy the book last night. 　或 I had no money, so I didn't buy the book last night.2. Because he wants to go to the basketball game, we go with him. 　或 He wants to go to the basketball game, so we go with him.2021/8/2672011∙莆田 —Why do you like this TV program? — _____ it’s very interesting and exciting. A. Though B. Because C. So2011∙宜宾He didn’t go to school yesterday _____ he was ill. A. because B. because of C. if D. so 2021/8/268二、If 的用法 if是英语中出现频率很高的连词，并且它的用法也很多。

学生感到很难掌握，为了让同学们更多更好地了解其用法及其语法功能现结合教学中遇到的情况，予以归纳　　 2021/8/2691. if作为连词，引导条件状语从句，它表示的意思是“假如”“如果”等在复合句中如果主句用将来时，则if引导的状语从句用一般现在时例如：If it doesn’t rain, we will go to the park next Sunday.If you ask him，he will help you．2021/8/26102. if作为连词还可以引导宾语从句引导宾语从句时和whether意思相同例如：Lily asked if / whether she liked it. 　　 She asked if ／ whether they had a cotton one.2021/8/26112013∙ 沈阳You can save money_____ you buy cheaper things. A. before B. unless C. if D. until2013∙大庆Nothing in the world is difficult _____ you put your heart into it. A. unless B. though C. because D. if2021/8/2612三、unless的用法 unless是从属连词，引导条件状语从句，含有否定意义，相当于if条件状语从句的否定形式。

所以unless = if not注意：unless引导的条件状语从句和if条件状语从句，与其它时间状语从句一样，用一般现在时代替将来时 2021/8/2613 连词unless意为“除非……如果不……”，“除了……”，多引导一个否定意义的真实条件句，有时也可引导非真实条件旬unless引导条件句时，主要用于下列情况 1. 主句为肯定句如：You will miss the bus unless you hurry up． You’ll fail in chemistry again unless you work harder．2021/8/26142. 主句为否定句如：Unless you oil the motor regularly．it won’t run smoothly． You will never get anywhere unless you have set your goal．2021/8/26153. unless在意义上相当于if...not，因此在有些场合中unless与if...not可互换使用Unless I am mistaken, I’ve seen that man before．=lf I am not mistaken, I’ve seen that man before．2021/8/26162013 ∙潍坊—May I go to Jinbao Park with you next Sunday?—No, you can’t, _____ you have a ticket. I have only one ticket. A. if B. until C. unless D. as soon as2021/8/2617四、although与though的区别和用法1. 用作连词表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式：Though [Although] it was raining，we went there. Though [Although] it was barely four o’clock, the lights were already on. 2021/8/26182. 用作副词although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放在句首)，意为“可是”、“不过”：It’s hard work; I enjoy it though. He is looking fit, though. You can count on him, though. 2021/8/26193. 用于习语在 as though(好像，仿佛)，even though(即使，纵然)等固定短语中不能用 although：She closed her eyes as though she were tired. We felt as though we had witnessed the whole thing. 2021/8/2620根据句子意思，选择although或though填空。

1. It was a hard job, he took it _____. 2. —Look! Some people are running the red lights. —We should wait _____ others are breaking the rule.althoughthough2021/8/26212011∙丽水1. 一I can stay and help you _____ you like． 一So nice of you．Bill．A．until B. though C．if D．and2011∙青岛2. You will achieve nothing _____ you work hard.A. if B. unless C. when D. that 2021/8/26222011∙广州2. _____ they are very tired, they feel happy because they’ve finally finished their project. A. So B. Although C. If D. But2013∙连云港 I won’t watch basketball matches _____James is playing. He pays much attention to teamwork. A. unless B. if C. although D. since2021/8/2623 连词是连接词、短语、从句或句子的词。

连词是虚词，在句子中不能独立充当成分同学们在做连词的题目是要通读句子，分析连词在句子中所起的作用，如表示并列、转折、重复、选择、因果等同时，注意连词引导从句的用法2021/8/2624 谢谢！ 2021/8/2625部分资料从网络收集整理而来，供大家参考，感谢您的关注！。