我们知道， think, assume, claim是议论文中常用引出观点的动词。在实际作文中，同学们往往认为几个词的意思是一样的，完全可以代换，所以拿过来就用。甚至还有同学把consider也拿过来与之混用。我们首先还是从定义来看这几个词的不同：

Think: to have opinion or belief about sth.

翻译为“认为”，通常接宾语从句来表达比较确定的观点。

Assume: to think or accept that sth is true but without having proof of it.

翻译为“假设、假定”，是否有事实依据是不确定的。

Claim: to say sth is true although it has not been proved and other people may not believe it.

翻译为“声称”，用这个词往往意味着不赞同紧跟其后的观点，所以很少用作 ‘I claim that…

Scientist are claiming a breakthrough in the fight against cancer, but in fact, ….

所以 ‘It is claimed that’ 通常翻译为“有报道称。。。”。和‘it is reported that ’的区别在于后者翻译为“据报道”，往往代表着作者赞同报告的内容，

Consider: to think about sth carefully, especially in order to make a decision

翻译为“考虑”，一般不用作引出观点，看个例子：

We are considering buying a new car.

所以，提醒您，千万不要在雅思大作文的第一段（观点表达段）就因为用词把握不准而导致对整篇文章的低分印象。

四、表“建议”的词汇后面忘记用虚拟从句

这是摘自学生作文中的一个病句：

I suggest he continues his study instead of working after graduation from high school.

因为 ‘suggest’翻译为“建议”，所以后面的从句应该用虚拟语气，黑体部分应该改为 “(should) continue”

所以提醒您，一定要牢记以下常见表“建议”的词汇，而且要记住这些词接从句时要用虚拟语气：

Recommend, suggest, advise

五、such as与for example的混用

我们知道，在表示举例子的时候，such as 与like是完全等同的，如：Wild flowers such as/like orchids and primroses are becoming rare.

但是同学们对于Such as、for example 的把握还是不够准确。我们都知道，后者接句子前者接词语表示举例子。于是就有了下面的写法：

There is a similar word in many languages, such as in French and Italian.

这里的such as改为 for example为好，因为“in French and Italian”其实是“there is a similar word in French and Italian”的简化，所以要用 for example来引出例证。再来看几个类似的例子：

It is possible to combine computer science with other subjects, for example physics.

最后，提醒各位考生，在平时的写作中绝对不能放过任何的模棱两可，只有平时“斤斤计较”才能做到“写作使人精确”。