Why

　　why do you ...? (200312，9)

　　Who

　　Who can do ...?(200406，10)

　　Would

　　Would you like to……?(199301，9)(199401，3)(199501，6)(199506，5)(199706，9)(200006,1) (200312,8)

　　would you get me through to sb? (200001，10)

　　wouldnt you do……? (200006，7)

　　Would you pass me the sports section please? (200501,9)

　　Do

　　Do you want……?(199306，10)(199506，4)

　　Do(Did) you mind……?(199401，2)(199501，5)

　　Do you enjoy……(199401，5)

　　Do you know……(199501，9)(199606，6)(199901，4)(199906，6)(200101，8)

　　Do you think its worth…… (199806，2)

　　Do you think I (we)should ...? (200306,6) (200309,1)

　　Can/May/Should

　　Could you please tell me ……(199401，6)(200101，2)

　　Could you give me a ride ? (200309,6)

　　Can I help you?(200312，4)

　　Can you give me a hand? (200312, 6)

　　May I ask you a few question…… (199906，3)

　　should he do that.....? (200206，6)