3、I shall be grateful if you are so kind as to help me.

【译文】如果您帮助我，我将不胜感激。

【分析】此句用在请求信的结尾部分,表达请求人对接受请求者的感谢之情，同时表达希望得到帮助的恳切之情。变换grateful的同义词，此句型还可以用I shall be much obliged to you if you…或 I will appreciate your favorable consideration of this request 代替。

4、It can be observed from the picture that more and more young people are showing their admiration to idols in an excessive way.

【译文】从图中可以观察到，越来越多的年轻人正以一种狂热的方式表达他们对偶像的崇拜。

【分析】此句适用于看图作文的开头，即对图中内容进行简单描述之后，揭示问题所在，继而进行论述。