连词(一)1、［误］Both my parents are not here. They went to the concert just now.［正］Neither of my parents is here. They went to the concert just now.［析］在英语中both一般用于肯定句中，如用于否定句中，其意义也不同于汉语，如：Both of us are not right. 在英语中应被理解为"我们俩不都对。
"而Neither of us is right。
才能被理解为"我们俩无一正确"2、［误］He or his parents has some tickets for the film.［正］He or his parents have some tickets for the film.［析］由or3、［误］You should study hard, and you won't pass the exam.［正］You should study hard, or you won't pass the exam.［析］or作为连词，这里的意思为"否则"。
又如：Hurry up, or you'll be late for school.4、［误］Though he is poor, but he is ready to help others.［正］Though he is poor, he is ready to help others.［正］He is poor, but he is ready to help others.［析］"虽然……但是"是中文中的常用结构，但在英文中用了"虽然"则不要用"但是"，用了"但是"则不能再用"虽然"5、［误］Either you or I are on duty.［正］Either you or I am on duty.［析］either…or 连接两个主语时，其谓语动词与相临近的一个主语相呼应，这也叫作就近原则。
类似的用法还有or, neither…nor, not only…but also6、［误］Tom is our English teacher and teaching English in our school now.［正］Tom is our English teacher and is teaching English in our school now.［析］并列句中常常在后面的句子中作一些省略，以免重复，但不是所有词都可作任意的省略的。
当你连接的是两个系动词时，后面的那个系动词不可省略，也就是讲连接的部分不7、［误］My father likes swimming and to collect stamps.［正］My father likes swimming and collecting stamps.［析］由并列连词连接的两个部分要保持相等的语法结构。
如是动名词则都用动名词，如8、［误］My father is reading a newspaper, I am doing my homework.［正］My father is reading a newspaper while I am doing my homework.［析］9、［误］My father asked me that if I wanted to learn how to drive.［正］My father asked me if I wanted to learn how to drive.［析］10、［误］We will go both to Beijing and Shanghai.［正］We will go to both Beijing and Shanghai.［析］用both…and11、［误］Not only Mary but also her brothers is going to dance.［正］Not only Mary but also her brothers are going to dance.［析］由not only…but also…连接两个主语时，其重点在其后面的那一个主语，所以谓语形式应12、［误］The teacher as well as his students are coming.［正］The teacher as well as his students is coming.［析］由as well as 连接两个主语时，谓语动词与as well as 后面的名词无关，而与前面的13、［误］Tom does not swim nor play football.［正］Tom does not swim or play football.［析］nor主要用于连接句子的对等连词，如在否定句中连接某一部分时要用or, 但要注意句子的含意，如：This animal does not like a cow or a horse. 这个动物既不像牛也不像马。
This animal does not like a cow but a horse.14、［误］For there is no light in the classroom. The students must have gone home.［正］The students must have gone home, for there is no light in the classroom.［析］由for引出的原因状语从句在使用时要注意不能将该从句置于句首，而应置于主句之后，并在主句与从句之间加一逗号。
更要注意的是because, as, since与for 4个表示原因的连词中because是因果关系，是最强的一个，而for是最弱的一个。
有些语法书中干脆把for 叫做并列连词15、［误］My brother will pass the English exam is no question.［正］That my brother will pass the English exam is no question.［析］主语从句的引导词that是不可省略的。
这一点不要和宾语从句的引导词相提并论。
16、［误］This map will show you how will you get to the hotel.［正］This map will show you how you will get to the hotel.［析］名词性从句作宾语从句使用时，最重要的一点是要用陈述语句。
特别要注意的是那些使用双宾语的动词，如：tell, ask, show17、［误］While the clock struch ten, all the lights went out.［正］When the clock struck ten, all the lights went out.［析］while是强调两个动作在同时进行中，如：While I am doing myhomework, my father is reading a newspaper. 而这里的when是"正当某某时刻"，"就在这一时间点上"，其重点强调18、［误］While I was walking along the street yesterday, I met an old friend.［正］When I was walking along the street yesterday, I met an old friend.［析］这里用when表达在一个动作的进行中，另一个动作突然发生了。
正在进行的动作19、［误］While I heard the bad news I felt sad.［正］When I heard the bad news, I felt sad.［析］while20、［误］After school some students play football, or others go to the library.［正］After school some students play football, while others go to the library.［析］while在此处意为"而，然而"21、［误］She sang when she walked along the dark street.［正］She sang as she walked along the dark street.［析］as用于句中时，其要点是强调两个动作的同时进行。
这里用when虽然不能讲是语22、［误］I finished my homework until twelve o'clock last night.［正］I didn't finished my homework until twelve o'clock last night.［正］I did my homework until twelve o'clock last night.［析］until用在句中时其含义是某一动作一直持续到某时结束，那么句中的动词则一定要用持续性动词，如果要用瞬间，或截止性动词时一定要用否定句式。
因截止性动作的否定式应看作是持续性的动作。
如离开leave是瞬间动作，因一出门即为离开了，而不离开则是长23、［误］I have studied English when I was twelve.［正］I have studied English since I was twelve.［析］since引出的时间状语从句是表达了一个时间点，而这个时间点是主句动作的启始点，24、［误］Because he didn't study hard, so he didn't pass the exam.［正］He didn't pass the exam because he didn't study hard.［析］because 与so25、［误］He was such excited that he could not speak.［正］He was so excited that he could not speak.［析］so与such的用法可以分为四种情况，①用于单数可数名词之前，其格式是such+不定冠词+形容词+单数可数名词，如：It is such a beautiful book that every child likes it. 也可以用so, 其格式是so+形容词+不定冠词+单数可数名词，如：It was so beautiful a book that every child likes it. ②在不可数名词前或可数名词复数前这时只能用such, 如：It is such good weather that we want to swim. 又如：They are such good students that they can pass the exam easily. ③在few, little，much, many 这4个字前只能用so而不能用such, 如：I have so much money that I can buy everything I want. ④当that前只有形容词或副词时，这时只能用so, 如：She is so beautiful that every one likes her. He ran so fast that I couldn't keep up with him.26、［误］He got up earlier this morning so as to that he could catch the first bus.［正］He got up earlier this morning so as to catch the first bus.［正］He got up so earlier that he could catch the first bus.［析］so…that与so that的用法有相同之处，那就是其后接从句，而so as to 其后要接不定式，即动词原形。