解析：
1. The motorbike was red, and there were two persons on the motorbike.
2. He told me he would be a good tennis player the next year when we met on a train.
3. If I failed to achieve my desire, I would think it comes from a fate beyond my power.
4. However, if the goals are obtained, my endless efforts will bring them to me.
5. No one could deny that computers have made our life convenient and made our work efficient.
6. Depending on computer, many problems can be easily solved, which was not possible 20 years ago.
指代不清
在使用代词如 it, he, she, this, that, which, one 等的时候，前面的句子中应该出现明确的先行词。如果指代不清，就会造成意思上的混乱。
巩固练习：改正句子。
1. The world's energy demand still continues to rise. How will that ever be possible for us to get through?
2. Peter told Alan that his wife was unhappy.
3. Marsha attributed her success to her husband's support, which was generous.
4. Susan's mother wondered if she was tall enough to be a model.
解析：
1. The world's energy demand still continues to rise. How will the situation ever be possible for us to get through?
2. Peter told Alan, "Your wife is unhappy."
3. Marsha attributed her success to her husband's generous support.
4. Susan's mother wondered if Susan was tall enough to be a model.
断句错误
英语的句子要求主从句直接要由恰当的衔接词连接，并列句也要求用衔接词或分号连接。由于汉语中没有这些要求，句子之间可以用逗号连接，因此，在四、六级作文中，很多同学的英语句子用逗号连接两个各自完整的句子;或将两个句子连接，但是没有使用标点符号或衔接词，以致于造成病句。
巩固练习：改正句子。
1. They read different books just to meet their different needs. Because different people have different needs to read the different kinds of books.
2. Students and teacher heard Liming went to hospital, all of them went to visit him.
解析：
1. They read different books just to meet their different needs, because different people have different needs.
2. When students and teacher heard Liming went to hospital, all of them went to visit him.
成分残缺
英语的句子虽然结构多样，但都是由基本的句子结构演化扩展而来。如果句子不符合基本的句子结构要求，缺少必要成分或者将从句或短语误当作句子，就不能表达一个完整的意思。由于英语和汉语的表达方法和习惯不同，成分残缺是中国学生在英文写作中容易出现的问题。
巩固练习：改正句子。
1. "Is honesty out of date?" many people asked. In my opinion, the answer should be "no". Because honesty is not a simple social phenomenon, but a kind of humanity which is rooted in our mind.
2. And then there is no need to worry whether you'll be lost in a strange place, if you have a cellphone. Especially, in some urgent situations.
3. There are other functions about cellphone. For example, time-schedule.
4. First, as we all know that cosmetics always contain complex chemical elements. Which many people will be allergic.
5. First of all, cellphone serves as a convenient way of communication. Since it allows you to chat with others on the phone whenever you like.
6. First, people deal with wastes carelessly. They pay little attention to the result of the wastes. Second, the development of industries.
7. In my opinion, honesty becomes more and more important in recent society. Though the society competition becomes more and more fierce.
8. We can do a lot of things to entertain ourselves in spare time. Like reading, and listening to music.
9. Personally speaking, friendship is an in-depth relationship combining trust, support, communication, understanding, empathy, and intimacy. Aspects of life that all of us crave.
10. Thus, could I make a piece of advice to you that reducing the price of food?
相关链接：大学英语四六级写作三大困境及应试策略
大学英语四六级考试写作高分必备十字真经
2008年6月大学英语四六级考试作文经典词汇归类
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