A foreign student who plans to come to the United States must have some
definite goals in mind. For the student who wants to improve his English quickly and learn about American customs firsthand（1）, there is often an opportunity to
live with an American family. There may be one or two disadvantages to this living arrangement（A）; however, I believe that there are far more advantages.
表明了背景，反方观点，正方观点，正方理由---(谈论一个项目的好处)
There may be one or two disadvantages to this living arrangement（A）; however, I believe that there are far more advantages of B. （谈论的是两个项目）
第一段背景+理由+论点
First of all, some minor disadvantages（展现了观点的倾向性） to living with an American family include both a lack of privacy and little opportunity to have independence (be independent). For instance, the foreign student may find that the family expects him to join them in group activities such as watching television and going on picnics. At times, however, he might enjoy staying in his room to read or to write letters to his family and friends.（两句例子） Another drawback
to living in an American home involves the possibility that the family may treat the student like a child. For example, the parents may want to decide who his friends will be（两个从句） and where he will go during his leisure time away from home.(每
个分论点都要有理由，每一个理由都要有例子，每个例子都要有细节)，这个例子完全是假设的，假的，但是由细节构成的，就很好，你可以看看细节
第一句话是一个观点；
2句是一个例子
3句还是举例
第四句和第一句是并列关系
第五句又举了个例子
第二段：平行结构
Even though there may be one or two disadvantages to living with an American family, the advantages far outweigh them. By taking part in a homestay program, the student has an excellent opportunity to learn about American customs（2）. He will find out how to behave in different social situations
such as parties and serionies (ceremonies) and how to dress (dress on) these occasions. Also, he will learn about many other aspects of the American way of life, such as the way schools are run in the United States. With a family close by, he can ask questions about attendance rules and school costs. The family will make certain(sure, point) that he becomes acquainted with this new way of life, and soon he will feel at home. .//通过such as充斥细节
第一句承上启下
二句表明该段的中心思想
三句表明分论点1
第四句表明分论点2
第五句是一个例子（例子当然不需要总用for example开头）
第六句是一个更细的例子
第七句是一个结尾
总分总的关系
Another advantage to living with an American family is that the student is in an ideal environment to improve his English. For example, each time he has a conversation with someone in the family, this native speaker can help him with his pronounciation (pronunciation) and grammer (grammar). Maybe the younger children in the family can help the student with his homework, too. But the most important thing is that he will be surround (surrounded) by English most of the time during his stay in the United States.
第一句是一个总结
第二局通过举例提出分论点
第三句又是一个分论点（通过举例）
第四句话又提出一个分论点
第四段为总分关系
将这种结构加入到文章中（3，4段为并列关系）
Although I agree that there may be a couple of disadvantages to living with an American family, I feel that the advantages are more obvious.（三次这种表达法） In a home-stay program, the student can learn about American customs in the most natural way possible（3）. In addition, he will find himself in an atmosphere（situation, occasion） in which his English will certainly improve. In
my opinion, these are the two most important goals for him to consider, and living with an American family is the best way to achieve them.
1 总结全文
2 表明分论点
3再次表明分论点
4再次提出总的论点
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