1.ask sb for sth :I asked him for help.我向他请求帮助~
2.ask sb to do sth:My mum asked me to do homework妈妈叫我做作业..
3.in return for:This book is in return for your help.这本书是为了报答你的帮助.
4.tell sb to do sth :He told me to go to work.他让我去工作
5.call at:He called at me yerterday.他昨天给我打电话了
6.call on:He called on people to work hard.他号召人们好好工作.