在雅思写作备考过程中，有部分同学经常会分不清介词和连词的用法，导致句子框架结构出问题。介词其后只能跟名词词性的单词或短语（包括动名词v-ing形式），而连词当中的从属连词跟的是含有主谓成分的句子（即从句）。例如：

　　although 、though     VS     despite、in spite of

　　Although / Though tele-education is convenient, traditional schooling is still the mainstream form of education.

　　Despite / In spite of convenience, traditional schooling is still the mainstream form rather than tele-education.

　　虽然远程教育很方便，但传统教育依然是教育的主流形式。

　　Although / Though it is a challenge for government to pay for the health care and education, no one can afford the payment.

　　Despite / In spite of the fact that it is a challenge for government to pay for the health care and education, inevitably, no one but administration can pay the bill.

　　尽管免费医疗和教育是一项挑战，但除了政府没有人能够负担得起这么巨额的账单。

　　because、as、since    VS    because of、due to

　　Because / As / Since the competition among the air companies is intense, it is possible today to find low cost flights everywhere.

　　Because of / Due to intense competition among the air companies, it is possible today to find low cost flights everywhere.

　　由于航空公司之间的激烈竞争，现今廉价航班随处可见。

　　as     VS     with

　　As the population is growing continuously, deforestation and pollution have an increasingly serious impact on the wildlife.

　　With the continuous population growth, deforestation and pollution have an increasingly serious impact on the wildlife.

　　随着人口数目不断增长，森林砍伐和污染对野生动植物的影响日益严重。

　　in case     VS     in case of

　　Numerous researches will pose an overwhelming burden on national purse in case private companies do not serve as a valuable complement to scientific research.

　　无数的研究势必会增加国库的负担，假如私营公司不担任科研项目的补充成分。

　　The new APP system can make people order meals, send packages and get help quickly in case of an emergency.

　　新的应用系统使人们能够迅速地订餐、寄包裹和在紧急情况下获得帮助。

　　以上就是环球教育（原环球教育）刘瑾怡老师对英语写作中介词和连词用法的举例，希望对大家有所帮助！