1、提高GMAT作文水平，首先要分析原因
原因上的問題，有以下三個：
可疑調查
樣本不足
結論無據
2、提高GMAT作文水平，也離不開分析結果
結論上的.問題，有以下兩個：
無因果聯繫
二者擇一
3、提高GMAT作文水平更需要論證上的分析
就是論證過程上的問題，有以下兩個，縱向橫向各一個：
錯誤類比
時地全等
這樣，只要記住了三字訣：因、果、證，就很容易記牢全部GMAT作文的問題了。爲了進一步夯實GMAT作文的記憶方法，我們下面講解一篇案例
下面是往期的一篇GMAT作文：
Our total sales have increased this year by 20 percent since we added a pharmacy section to our grocery store. Clearly, the customers main concern is the convenience afforded by one-stop shopping. // 無因果聯繫，可能另有他因。 The surest way to increase our profits over the next couple of years, therefore, is to add a clothing department along with an automotive supplies and repair shop. We should also plan to continue adding new departments and services, such as a restaurant and a garden shop, in subsequent years. // 時地全等 Being the only store in the area that offers such a range of services will give us a competitive advantage over other local stores. // 結論無據
