一.引出開篇類

　　1.Recently the problem of…… has been brought into focus. ==Nowadays there is a growing concern over ……(近……問題引起了關注)

　　2.With the development of our economy and society，pollution is more and more serious.

　　3.Now people become increasingly aware/conscious of the importance of ……

　　二.提出建議類

　　1.There is no doubt that enough concern must be paid to the problem of……(毫無疑問，對……問題應予以足夠重視)

　　2. Obviously ,if we want to do something … it is essential that……(顯然，如果我們想要做么事，很重要的是……)

　　三.故事引出類

　　1 .I have a friend who ... Should he....? Such a dilemma we are often confronted with in our daily life.

　　2. Once upon a time, there lived a man who .... This story may be (unbelievable)， but it still has a realistic significance now。

　　四.表達不同觀點類

　　1.People's views on……vary from person to person. Some hold that……However, others believe that……(人們對……的觀點因人而異，有些人認為……然而其他人卻認為……)

　　2. There are different opinions among people as to……(對于……人們的觀點大不相同)

　　五.預示后果類

　　1. Obviously，if we don't control the problem, the chances are that……will lead us in danger.(很明顯，如果我們不能控制這一問題，很有可能我們會陷入危險)

　　2. It is urgent that immediate measures should be taken to stop the situation(很緊迫的是應立即采取措施阻止這一事態的發展)

　　六.引用名句類

　　1. Education is not complete with graduation." This is the opinion of a great American philosopher. Now more and more people share his opinion.

　　2. Love me, love my dog.