四、提出建議

1：It is high time that we put an end to the (trend).
2：There is no doubt that enough concern must be paid to the problem of……
3：Obviously ,if we want to do something … it is essential that……
4：Only in this way/by doing… can we ……
5：Spare no effort to + V （不遺余力的）

五、預示后果

1：Obviously，if we don't control the problem, the chances are that……will lead us in danger.
2：No doubt, unless we take effective measures, it is very likely that ……
3：It is urgent that immediate measures should be taken to stop the situation

六、表示論證

1：From my point of view, it is more reasonable to support the first opinion rather than the second.
2：I cannot entirely agree with the idea that……（我無法完全同意這一觀點）
3：As far as I am concerned/In my opinion,……（就我來說……）
4：I sincerely believe that……==I am greatly convinced that…….
5：Finally, to speak frankly, there is also a more practical reason why ……（最后，坦率地說，還有另外一個實際的原因……）

七、給出原因

1：The reason why + 句子 ~~~ is that ……
2: This phenomenon exists for a number of reasons .First,…….Second,…….Third，……。
3：For one thing,…… For another thing，…… ==On the one hand,……On the other hand……
4：I quite agree with the statement that……The reasons are chiefly as follows.我十分贊同這一論述，其主要原因如下。