They worked very hard carrying food to their home.这句中我觉得hard后面为什么可以直接加动词ing,请大家帮我分析下语法,

They worked very h___ They worked very hard this morning. they worked very hard this morning they worked very hard this morning （对划线部分提问） They worked very hard this morning .划线部分：worked very hard They worked very hard this morning.划线部分提问worked very hard是划线部分 they worked hard on the farm t_____it was very dark 两道换线提问（）代替.I worked (very hard).They brought (young trees) Most have worked their way up from sales representatives,and they are very pround of they worked very hard ther yesterday very hard ther yesterday 的顺序为啥very hard ther yesterday 的顺序为啥这样 翻译句子：在接下来的年月里,他们拼命工作.during the years __________,they worked very hard. the workers worked very hare.they so were often praised by theer boss（改错)拼错了- 是 hard 、their Though it rained very heavily,they went to __.A working B to work C works D worked maybe i worked very very hard. maybe i worked very very hard. They worked hard at___(sing). They worked ___________(hard).急 english questionswhat ( )are you doing?you've beem siiting there for 1 hourA on earth B in earth C on the earth D in the earthhe ( ) goes to bed very late,but she worked ( )till midnight yesterdayA hardly,hard B hard hardly C harder hard D hardly har