He is running这句话为什么run要加ning

He is running这句话为什么run要加ning Bill is a great running star.He is very well.中,running为什么要用running? he is running 填什么 He came with running这句话有没有语法错误,有的话请告诉我为什么,还有该怎么说. she is gone running off like a bad animal.为什么后面要加running off,这句话的意思加分析语法. 这句话有语法的错误吗?1,He pratices running for an hour every morning.2,The doctor advice is that he (should) eat. He is on his school running team.总觉得这句话有点怪：如果这样读：He is on （his school）(running team).觉得读的不通,意思上也说不对；如果这样读：He is on his （school running team).校跑步队又不是他的啊? Which car is the one that is running fastest?这句话错在哪里 that is running 哪里错了? Is he running﹍exercise?No,I think he is running﹍catch a bus.A to;to B for;for C for;to为什么选C? he find the boy is clever 这句话为什么不对 he is good at running?怎么提问 He is running quickly.(改为感叹句） he is running是主系表结构吗 he is running the 100 metres How fast the boy is running?把running去掉可不可以?为什么?若改用what引导,是不是What a fast boy he is?若是这样,那么running要放哪儿?running在第一句中是做什么成份？ He is （P ） running,根据首字母提示填空,并写出为什么要填这个 He comes the record, running it down 这句话怎么翻译?原文如下：Look at Bolt gold. It's a three-meter lead.He is coming to the homestretch. He comes the record, running it down.B* and catch him. God, he is gonna do it again. What's the job, he narrowly escaped being run over by a car.这里run为什么不变换成running 确是句子中写的那样.还有这句话意思?