七、句子类型（1）
　　1. 简单句 私家车越少就意味着交通堵塞越少。_________________________________________
　　The exhaust gas and irritating noise impair people’s health greatly.
　　Today's parents spend too little time staying with their children and use television to make their children keep quiet.
　　Nowadays, an increasing number of people do not wear their national clothes, thus forgetting their culture and their history.
　　2. 并列句（平行结构）Some people live in one community all their lives, while others move around almost as much as nomads.
　　Both of tourists and hosts should respect reciprocal (mutual) customs and culture.
　　A person's living environment can greatly affect both his physical and mental health.
　　Paid-work helps a student to develop greater independence, and earning his own pocket money can teach him how to handle his finances.
　　On one hand, teachers can impart knowledge to students; on the other hand, they can educate them how to be real persons.一方面教师可以向学生传授知识，另一方面又教育他们怎样做人
　　3. 复合句
　　(1)主语从句 Those who____ can____.Those who hardly eat meat in daily life (Vegetarians, Antivivisectionists)can prevent some serious diseases caused by unsanitary meat.
　　An increasing number of people come to realize that the disappearance of some endangered species of animals will pose a serious threat to the equilibrium of ecosystem.
　　(2) 宾语从句
　　Many experts point out that physical exercise contributes considerably to a person’s physical fitness.
　　许多专家指出体育锻炼极大地有助于身体健康。An increasing number of people come to realize that the disappearance of animals will result in serious threat to the equilibrium of ecosystem eventually.The decline of British industry has meant that poorly educated men, in particular, have fewer job opportunities.
　　(3) 表语从句The flaw in this explanation is that British teenagers are, in general, richer, better educated and wealthier than ever.
　　(4) 定语从句 Running theaters and stadiums can earn much money that can contribute substantially to other fields, including medical care, and education.
　　Only in these times where competition is becoming increasingly fierce, university graduates find it hard to obtain a job.
　　Children with parents whose guidance is firm, consistent, and rational are inclined to possess high levels of self-confidence. 父母的教导如果坚定，始终如一和理性，孩子就有可能充满自信。
　　Water, which is essential for life, can quickly become the only thing that matters if there is a threat to our water supply. 水对生命至关重要，如果供水成了威胁，很快就会变成唯一关键的问题
　　(5) 状语从句 见课堂笔记(重点掌握)
　　(6）同位语从句Some people hold the opinion that preventing wild animals from dying out is a waste of resources.