a. 作文精典句型练习：
1.it + 被动语态 + that…
1)it i widely acknowledged ( recognized ) that etenive deforetation contributed to heavy ummer flooding.
2)it i reported that 800000 applicant at for the national mater’ entrance tet in .
3)it i etimated that two third of the citie of our countrie will be in acute hortage of freh water by .
4)it i generally accepted that to practie euthanaia on a patient who i till alive i inhuman.
5)it mut be admitted that the price war will diturb the normal order of the market. (admittedly)
6)it cannot be denied that the overgrowth of tourim may detroy the ecological balance of ome cenic reort.
7)it i known to all that phyical eercie can improve and enrich our phyical and mental well-being.
2.it i + 形容词 + that… (形容词+ly，也可)
1)it i obviou ( evident, clear, undeniable, apparent) that the ituation i caued directly by eceive commercial fihing.
2)it i undertandable (inevitable) that people’ attitude are divergent on thi controverial iue.
3)it i unimaginable (incredible/unbelievable) that uch a boy of 17 hould have had three novel publihed.
3.it i + 形容词 + for b (th ) to do th
1)it i important (vital) for everyone to participate in phyical eercie, for they will do good not only to our body but alo to our mind and peronality.[由www.haoZuowen.Com整理]
2)it i currently difficult for a univerity tudent to find an ideal job upon hi graduation, epecially thoe majoring in fundamental coure uch a hitory and mathematic.
3)it i highly neceary for our government to top the corruption of government official.
4)it i imperative that omething urgent be done to combat the widepread ue of illegal drug among teenager.
4.with/a “随着”句型
1)with the rapid growth of economy, the living tandard of the chinee people have greatly improved. many of them can now afford to buy houe and car.
2)with the growing number of college graduate being turned out each year, the ituation in the job market i getting tighter and tighter.
3)随着中国人民生活水平的提高，越来越多的中国人能够出门旅游了，有的甚至选择去国外旅游。
4)a indutry and agriculture develop, the problem of water hortage will be the more eriou.
5)a the reform proce of tate enterprie peed up, more and more worker are likely to be laid off, entering the competition in job market.
6)随着咱们国家经济的飞速发展，越来越多的人意识到，资源的短缺将对我们国家的未来发展构成严重的威胁。
5.there be句型
1)in the pat ten year there ha been a marked decline in the number of young married couple who want to have children.
2)recently, there ha been a h2 debate on whether human being hould be cloned.
3)there are till quite a number of children who cannot afford to go to chool becaue of poverty.