6．set out／off出发；开始

　 We set out to work at five in the early morning and hoped to finish it before dark．

5．set about doing sth．(=set to do sth．／set out to do sth．／get down to doing sth．)开始……；着手……

　 We’11 set about doing this next month．

4．send off寄出，派遣；给……送行

　 send in寄送某处进行处理　　 、

Many of his friends sent him off at the airport. (see him off)

　 He sent in 3 drawings for the competition．

3．send up发射

　 A number of man-made satellites have been sent up into space in the past few years．

2．send out发出(光亮等)

　 The sun sends out light and heat．

1．send for派人去请

The police were sent for as soon as the accident took place．

6．answer for对……负责

You will have to answer for your behaviour one day

5．ask sb．to do sth．要某人做某事

　 ask sb．for sth．向某人要某物

4．ask for要；请求

　 He often asks his parents for money．

3．hear of听说

　 I don’t know him．but I have heard of him．

　 hear from接到某人的书信

　 I haven’t heard from him for nearly a year．