托福写作中，使用多样化和高级的句型可以帮助考生提升文章的整体质量和分数。以下是一些托福写作中常用的句型总结：

　　1. 引入观点或主题

　　In the following essay, I will explore the arguments for and against the [topic].

　　The issue of [topic] has sparked widespread debate, with proponents and opponents presenting varying viewpoints.

　　2. 表达同意或反对

　　I firmly believe that [opinion], as [reason].

　　While some may argue that [opposing view], I disagree, believing that [your view].

　　3. 阐述原因或理由

　　One of the primary reasons for [phenomenon] is [reason].

　　The decision to [action] was motivated by several factors, including [reasons].

　　4. 举例说明

　　To illustrate this point, consider the example of [example].

　　Among the many instances of [phenomenon], one noteworthy example is [example].

　　5. 转折或对比

　　Although [first situation] may seem advantageous, it pales in comparison to [second situation].

　　While [first opinion] has its merits, [second opinion] offers a more compelling argument.

　　6. 总结或强调

　　In conclusion, [conclusion or restatement of main point].

　　The significance of [topic or point] cannot be overstated, as it [explains importance].

　　7. 表示条件或假设

　　If [condition], then [result].

　　Were it not for [circumstance], [hypothetical outcome] would be unlikely.

　　8. 表示让步

　　Granted, [opponent's point] has some validity, but [your counterpoint].

　　Admittedly, [weakness of your argument], but [strength or counterargument].

　　9. 表示递进

　　Not only [first point], but also [second point], making [topic] a complex issue.

　　[First point] is important, but even more crucial is [second point].

　　10. 表示因果关系

　　The [effect] can be traced back to the [cause].

　　[Cause] led to [effect], which in turn [further effect].

　　11. 表示比较或对比

　　While [first item] may be [characteristic], [second item] is [different characteristic].

　　[First item] differs from [second item] in that [difference].

　　12. 表示强调

　　It is crucial to note that [important point].

　　Without a doubt, [point] is fundamental to [topic].

　　13. 表示举例

　　For instance, [example] demonstrates the [point].

　　[Example] serves as a prime example of [phenomenon].

　　在使用这些句型时，请确保它们自然地融入你的文章，并且与你的观点和论据保持一致。同时，也要记得在写作过程中保持语法和拼写的准确性，这将有助于提高你的托福写作分数。