1．表示事实、现状
1）We cannot ignore the fact that．．．
2）No one can deny the fact that．．．
3）There i no denying the fact that．．．
4）Thi i a phenomenon that many people are intereted in.
5）However, that’ not the cae.
例：We cannot ignore the fact that indutrialization bring with it the problem of pollution. To olve thee problem，we can tart by educating the public about the hazard of pollution. The government on it part hould alo deign tricter law to promote a cleaner environment.
2．表示比较
1）Compared with A, B．．．
2）I prefer to read rather than watch TV.
3）There i a triking contrat between them.
例：Compared with car, bicycle have everal advantage beide being affordable. Firtly, they do not conume natural reource of petrol. Secondly, they do not caue the pollution problem. Lat but not leat, they contribute to people’ health by giving them due phyical exercie.
3．表示数量
1）It ha increaed (decreaed) from．．．to．．．
2）The population in thi city ha now increaed (decreaed) to 800, 000．
3）The output of July in thi factory increaed by 15％compared with that of January.
例：With the improvement of the living tandard，the proportion of people’ income pent on food ha decreaed while that pent on education ha increaed.[由www.hAozuowEn.com整理]
再如：From the graph lited above，itcan be een that tudent ue of computer ha increaed from an average of le than two hour per week in 1990 to 20 hour in 2000.