［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.
［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.
［误］ My father likes swimming and to collect stamps.
［正］ My father likes swimming and collecting stamps.
［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.
［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.
［误］ We will go both to Beijing and Shanghai.
［正］ We will go to both Beijing and Shanghai.
［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。
［误］ While I heard the bad news I felt sad.
［正］ When I heard the bad news, I felt sad.
［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.
［误］ She sang when she walked along the dark street.
［正］ She sang as she walked along the dark street.
［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.
［误］ I have studied English when I was twelve.
［正］ I have studied English since I was twelve.
［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 so在英文中两者不能并用的，只能在句中用其一。
［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.
［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。这样的词组还有：in order to。
［误］ I want to buy same stamp that you have.
［正］ I want to buy the same stamp as you have.
［析］ the same…as (that)这是个固定用法，在same前的定冠词是不能少的。而the same…that意为"我要的就是那一个"。而the same…as为"要的是和……一样的东西"。
［误］ Before I do not give you the answer, I'll ask you some questions.
［正］ Before I give you the answer, I'll ask you some questions.