托福写作thesis statement要怎么写？独立写作中最重要一句话就是thesis statement，也就是你的观点(opinion)。写在开头段的最后。那么如何判断你的写出的thesis statement是符合美国人要求的呢?那么，你就要问自己以下5个问题。
1.这是不是一句grammatically-complete的句子?
2.它是否arguable(可以被议论的)?
3.它是否supportable(可以被支持的)?
4.它是否表达了一个main idea?
5.它是否是个疑问句?
来看一下例子：我的观点是California was the best trip ever. 那么这句话是否是个合格的thesis statement呢?通过问自己这5个问题我们就可以判断出来。
1.这是不是一句grammatically-complete的句子?
是的。这句话有主语和谓语。
2.它是否arguable(可以被议论的)?
是的。很明显，我是通过对比了其他地方的旅行经历才得出了加州是最棒的这一观点。
3.它是否supportable(可以被支持的)?
是的。我会用三个分论点来支持我的观点。1)learning how to surf at Malibu; 2) going sightseeing; 3) meeting Vincent.
4.它是否表达了一个main idea?
是的。我只有一个main idea：having a fantastic time in California.
5.它是否是个问句?
不是问句。
thesis statement永远不可以是一个问句。
所以，基于这五个问题的分析，我们可以确定California was the best trip ever.这句话是一个合格的thesis statement。
在了解了什么是thesis statement的基础上，来看一下什么是假的thesis statement。
a statement of fact 事实的陈述
a.Alaska is a big state.
这是一个不能够被讨论的事实，是一个真理。
b.Californian red wine is the best in the world.
这句话可以作为thesis statement因为是完整的一句话，能够被议论，被支持，表达了一个主要观点，并且不是疑问句。
a question
a. Is global warming a problem?
这里又要强调一遍thesis statement永远不可以是一个问句。
b. Global warming threatens the future of the planet.
这句话可以作为thesis statement因为是完整的一句话，能够被议论，被支持，表达了一个主要观点，并且不是疑问句。
a sentence fragment
a. Paris: the most beautiful cityin Europe.
这句话不是完整的句子。缺少“is”。
b. Without a doubt, the TOEFL iBTis a true measure of your potential.
这句话可以作为thesis statement因为是完整的一句话，能够被议论，被支持，表达了一个主要观点，并且不是疑问句。
simple announce the topic
a. In this essay, I will talkabout the problem of teenagers drinking and driving in my country, Argentina.
这句话只是告诉读者将要写的内容(topic)，而没有出现观点。
b. Personally, I think thatteenagers must finish high school before they can get a driver’s license.
这句话可以作为thesis statement因为是完整的一句话，能够被议论，被支持，表达了一个主要观点，并且不是疑问句。
丨练习：判断真假thesis statement
everyone should learn a foreign language.
How difficult is it to get a perfect score on the TOEFL iBT?
The CEO told us that the company had no other choice but to lay off five thousand employees.
In this essay, I’m going totalk about dogs and cats, and other domestic animals.
Iwona is ecstatic. Her grades are so good she got into Harvard and Yale. Now she must choose which one she will attend.
Last night, I went to an Italian restaurant and had lasagna.
The TOEFL iBT consists of four sections: reading, listening, speaking, and writing.
There are many English language proficiency tests; however, TOEFL is the test you must take if you are serious about studying at an English-speaking college or university.
Drinking a bottle of red wine every day will make you smarter.
Why is the price of gasoline going up?
答案：
真
假
假
假
假
假
假
真
真
假
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