1.中文：由于今天感觉不适，我决定待在家里。

(误)For I did not feel well today, decided to stay at home.

(正)I decided to stay at home for I did not feel well today.(对等连词for连接两个对等的句子时不可放在句首。)

2.中文：虽然他很富有，但他并不快乐。

(误)Although he is very rich, but he is not happy.

(正)Although he is very rich, he is not happy.(though或although放在字句首时，本身就具有虽然…但是的意思，不可和but连用。)

3.中文：他向我道歉我才跟他说话。

(误)I shall speak to him until he apologizes.

(正)I shan't speak to him until he apologizes.(not…until表示到…时候才，在此句中speak的动作要等到他道歉时才发生。)

4.中文：因为我想学英语，所以我买了一本字典。

(误)Because I wanted to learn English, so I bought a dictionary.

(正)Because I wanted to learn English, I bought a dictionary.(because本身就具有因为…所以的意思，不可再和so连用。)

5.中文：他既不说英语也不说法语。

(误)He neither speaks English nor French.

(正)He speaks neither English nor French.(either…or，not only…but also等对等相关连词所连接的部份应是相同词性或起相同作用。)

6.中文：不是你错了就是我错了。

(误)Either you or I are wrong.

(正)Either you or I am wrong.(在含有either…or的句子中，谓语动词的数由较近的主语决定。)

7.中文：我从来没有去过伦敦和巴黎。

(误)I have never been to London and Paris.

(正)I have never been to London or Paris.(在否定句中，对等连词一般不用and，而用or。)