6．相邻的句子，是否避免了不必要的结构转变

a) While we reduce the number of vehicles, the speed of traffic can be increased.

b) While the number of vehicles is reduced, the speed of traffic is increased.

两个非常相关的意思，不要一个使用主动结构，一个使用被动结构。

a) Each of us may take a part-time job to help support ourselves, but if you spend too much time on it, your study will be affected.

b) Each of us may take a part-time job to help support ourselves, but too much time spent on it, our studies will be affected.

前半句用each of us和ourselves，后半句却用you和 your study，应一致起来。

7．可数名词与不可数名词是否用得正确

a) TV presents us with many useful informations.

b) TV presents us with a lot of useful information

还有evidence, advice, knowledge等都是不可数名词，都不能用复数。另外， many, a great number of, another, few 等只能与可数名词配用。而a great amount of, a great deal of, less, much 等应与不可数名词配用。

a) Making our cities greener is not an easy work.

b) Making our cities greener is not an easy job.

work 用作可数名词是“作品”这类意思，而表示“工作”时，不可数。同样，在 Word has been sent out that those who cheat on exams will be punished. 这个句子中，要用单数word表示“信息”。

a) Each people has his own opportunities.

b) Each person has his own opportunities.

people作“人民”、“人们”解时，是集体名词，不能与each配用。a people或 peoples表示民族、国家。在正式语体中也不能说 less people，而应说 few people。

8．冠词是否用得正确

a) Book knowledge is important, but we should also learn something in the society.

b) Book knowledge is important, but we should also learn something in society.

用定冠词the, 是特指意义，而这里没有这个特指意义。同样，在When I was in the high school, I always have a beautiful picture of the college life. 中，两个the都应去掉。

a) If there were no electric power, we would have to do everything by the hands.

b) If there were no electric power, we would have to do everything by hand.

表示用手 (by hand), 走路 (on foot), 上课 (in class), 上学 (go to school), 住院 (at hospitable)等，都不用定冠词。

a) If there were no electric power, factory would stop producing goods, car, bus and train would stop running.

b) If there were no electric power, factories would stop producing goods; cars, buses and trains would stop running.

用可数名词时，要么前面有冠词（the, a, an)或代词(his, her, my), 要么以复数形成出现。不能像中文名词那样没有语法变化。

（来源：网络）