参考例文：
It has become an accepted fact that people are becoming increasingly dependent on the use of disposable plastic bags, for the reason that it is of much convenience. It is disturbing to realize that even when it is unnecessary, sometimes people still use them.
第一句话客观陈述想象，第二句话把现象定性--- disturbing，同时引向第二段的内容。 “It has become an accepted fact that„”是第30课出现的句型，可用作客观现象陈述的导入句； “for the reason that”出现在第4课，用于表示原因，可以替换“because”使用; “it is disturbing to think that „”是第1课出现的句型，可用于对不好的现象的表态，体现主人翁意识。
We cannot have failed to notice that the use of disposable plastic bag has given rise to a series of problems. Environment pollution, for instance, is the most remarkable and upsetting one.
第一句总起句，第二句具体提到最突出的一个问题。 “cannot have failed to notice that” 是第18
课的句型，同样是不错的导入句，引出大家都耳熟能详的问题 “give rise to”在第4课出现，可用于表示因果引起关系。
It is encouraging that the government has drawn up laws to limit the use. Sure enough, this effort has been exerting great influence on our lives. Most importantly, the environment condition has been improved to a large extent, because of which we are able to lead healthier lives. In addition, it certainly makes it possible for us to save sources. This policy is to be carried out in a long run.
第一句话从问题过渡到解决方法，即“limit the use”，然后先总的说是“exert great influence on our lives”然后分别从“environment condition” “healthier lives”和 “save sources”三个方面阐述具体的意义，最后再用一句话将其意义推到一个战略高度。该段的词组 “draw up”, “sure enough”, “exert „influence on„”等词组
“because of which”的句型都是新三课文出现了，应用关于写作中都能提升文章档次。
12课课文模仿 Most of the adolescents have formed an
unrealistic opinion of the marriage. Some of them imagine the marriage to be a sort of paradise where life is always romantic and the young couple always loves each other deeply. The other side of the opinion is quite the opposite. They consider that marriage life is wretched. You either are tortured to death or live like
Socrates, as a philosopher. Perhaps, there is an element of truth in these both opinions. However, few of us have had the opportunity to find out.
2009年06六级作文 Names are distinctive and meaningful symbols which serve to tell one individual from another. (这是lesson 1第一句的下定义句型的仿写，“Pumas are large cat-like animals which are found in America.”在对比论述前先将要讨论的对象下个简单的定义还是必要的。) In the light of this statement,(Lesson 27, line 2进一步阐述的过渡句) names definitely are essential in our daily and social lives. (Lesson 58, line 8, essential 相对于important 而言更加高级，而且这个结构可以将在哪方面重要也一起表达出来)Some even go so far as to (lesson 46, line 8, 这个词组引出认为名字重要的人群最极端的观点) argue that without a remarkable name, nothing could ever be brought to a conclusion.(Lesson 60, line 1, 利用虚拟语气来强调名字的极大重要性，表现力更强)
The other perspective is quite the opposite. (lesson 12, line 4 过渡到反面观点)Names are none other than (lesson 30)a device to help people identify others. Whether a person’s name can be remembered or even become immortal(lesson 17, line 6) largely depends on his or her
contributions, accomplishments, capabilities and some other internal qualifications. (Whether„.depends on„lesson 29，line 1) Perhaps there is an element of truth in both of these ideas, (lesson 12, line7, 表明本人看法前先对上述两种相反观点进行评价)but I consider a moderate attitude to be more reasonable. Names are by no means (lesson 17, line 4) the only decisive element for a person’s fate and life, but to varying degrees (lesson 24, line 10)，they surely exert a subtle influence on (lesson 26, line 3) us all.