demand ,require ,request用法辨析(后面动词或名词从句如何连接)

问题描述:

demand ,require ,request用法辨析(后面动词或名词从句如何连接)

只讲解这三个单词做动词的用法如下:
1.require
1)require sth (of sb)
2)require sb to do sth
3)require doing 主动表被动
4)require that-clause〔虚拟语气:(should)+V原〕
2.demand
1)demand sth of/from sb
2)demand to do sth;demand to be done
3)demand that-clause〔虚拟语气:(should)+V原〕
3.request
1)request sth of/from sb
2)request sb to do sth
3)request that-clause〔虚拟语气:(should)+V原〕