1) on request _
2) by request of _
3)at sb's request/at the request of sb_.
4) request sb. to do sth. _
5) request that sb. (should) do sth. _
6) request sth. of sb. _
7)It was obvious that she was there at Ray's____  ．很明显  她是应雷的要求到那里去的。
8)The workers____a rise in the salary.工人们要求提高  工资。
9)May I____stop talking.能不能请  你不要再讲了。
10)I requested that he_____an hour earlier.我要  求他早到一小时。