1.Violent films can do harm to young people, because they containsnumerous negative information.

　　暴力影片对年轻人是有害的，因为其中包含大量负面信息。

　　2.Human beings are chiefly responsible for wild animalextinction.

　　野生动物灭绝的主要责任在人类。

　　3.We should attribute (ascribe)medical advances to the animals whichdo substantial contributions to the experiment.

　　我们应该把医学的发展归因于动物对实验做出的巨大贡献。

　　4.Because of overpopulation, water shortage has become one of the mostserious problems.

　　由于人口过剩，水短缺已经成为一个最严重的问题。

　　5.Owing to the fierce competition in today’s world, a great many young peoplefind themselves under great pressure.

　　由于当今世界的激烈竞争，大量的年轻人承受巨大的压力。

　　六、英语句子成分

　　1.主语(名词，代词，不定式，动名词，句子)

　　2.谓语(动词或动词短语)

　　3.宾语(名词，代词，不定式，动名词，句子。

　　跟不定式作宾语的常见动词：

　　want agree hope plan decide offer prefer wish intend fail desirerefuse afford choose manage expect aim promise consent pretend neglect ignoreomit happen determine demand threaten resolve decline propose undertakevolunteer。

　　跟动名词作宾语的常见动词：

　　finishenjoy mind keep stop dislike consider suggest miss avoid regret admitacknowledge delay practice deny imagine postpone risk advocate recall resistappreciate cannot help confess escape fancy defer resent evade contemplate forgivepermit detest repent。

　　跟双宾语的常见动词：

　　asksent show teach give bring buy find get keep lend tell write wish offer deprive

　　4.表语(名词，形容词：某些形容词，如careless,absurd, brave, courageous, careful, careless, clever, wise, foolish, silly,stupid, good, nice, kind thoughtful, inconsiderate, greedy, money-orientedacquisitive materialistic generous, honest, modest, polite, rude, cruel,selfish, self-centered egocentric wicked, wrong等不定式后可以加of来引导出其逻辑主语。代词，数词，不定式，动名词，分词，介词短语，句子)

　　5.定语(形容词，代词，数词，不定式，名词，动名词，分词，介词短语，句子)

　　6.状语(副词，形容词短语, 不定式，分词，介词短语，名词，句子)

　　7.补语(形容词，名词，不定式：下面的动词要求不定式做宾补：动词+宾语+动词不定式-----ask get prompt allow forbidprefer announce force press inspire require assist hate pronounce advise recommend bear implore remind beg induce reportcompel invite command intend show drive mean train causeinstruct deserve leave tell direct tempt entitle order warn enable needurge encourage oblige condemn

　　teach entreat permit wish，分词，介词短语)

　　8.同位语(名词，不定式，动名词, 句子，后跟同位语从句的常见词f---actnews question proposal report altitude (latitude longitude evidence proof suggestion request ideaconclusion thought notion value fiction fear)

　　9.插入语(不定式，分词，介词短语，句子)

　　七、常用典型句式

　　1.This view is now being questioned by more and more people.

　　这一观点正受到越来越多人的质疑。

　　2.Although many people claim that, along with the rapidly economic development, the number of people who use bicycle are decreasing and bicycle is bound to die out. The information I've collected over the recent years leads me to believe that bicycle will continue to play extremely important roles in modern society.

　　尽管许多人认为随着经济的高速发展，用自行车的人数会减少，自行车可能会消亡， 然而，这几年我收集的一些信息让我相信自行车仍然会继续在现代社会发挥极其重要的作用。

　　3.Environmental experts point out that increasing pollution not only causes serious problems such as global warming but also could threaten to end human life on our planet.

　　环境学家指出：持续增加的污染不仅会导致像全球变暖这样严重的问题，而且还将威胁到人类在这个星球的生存。

　　4.In view of such serious situation, environmental tools of transportation like bicycle are more important than any time before.

　　考虑到这些严重的状况，我们比以往任何时候更需要像自行车这样的环保型交通工具。

　　5.Using bicycle contributes greatly to people's physical fitness as well as easing traffic jams.

　　使用自行车有助于人们的身体健康，并极大地缓解了交通阻塞。

　　6.Despite many obvious advantages of bicycle, it is not without its problem.

　　尽管自行车有许多明显的优点，但是它也存在它的问题。

　　7.Bicycle can't be compared with other means of transportation like car and train for speed and comfort.

　　在速度和舒适度方面，自行车是无法和汽车、火车这样的交通工具相比的。