连词是用来连接词与词、词组与词组或句子与句子、表示某种逻辑关系的虚词，它不能单独作句子的成份。连词可以表并列、承接、转折、因果、选择、假设、比较、让步等多种关系。下面就让我们共同来学习一下一些常见连词用法的正误辨析吧！
[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。”。
[误] He or his parents has some tickets for the film.
[正] He or his parents have some tickets for the film.
[析]由 or连接两主语时，谓语动词应与相临近的那一个主语保持一致。
[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.
[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”，二者只可用其一。
[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 also等。
[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可省略。
[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，如用不定式则都应用不定式，这是初学者要注意的一点。
[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] 两个并列句中间不可用逗号连接，要用并列连词来连接。
[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] 宾语从句的连接词只能有一个不能重复使用。
[误] We will go both to Beijing and Shanghai.
[正] We will go to both Beijing and Shanghai.
[析]用 both… and…作连接词时，其相连接的部分结构也要相同。
[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，所以谓语形式应采用就近原则。
[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，而与前面的名词相一致。
[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. 这个动物不像牛而像马。
[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, for这四个表示原因的连词中 because是因果关系最强的一个，而 for是最弱的一个，有些语法书中干脆把 for叫做并列连词。
[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。
同学们，今天的常见连词用法正误辨析就到这里，下周我们将继续为大家呈现下半部分，请继续关注哦！
