1.feed 2.say 3.pay 4.drive 5.swim 6.rise 7.ride 8.throw 9.fly 10.leave写出它们的过去形式、过去式形

fed,fed;

said,said;

paid,paid;

drove,droven;

swam,swum;

rose,sisen;

rid,ridden;

threw,thrown;

flew,flown;

left,left