be running

be running be running for exercise 还是 running for exercise 请问“i will be running 15 minutes You can ____ (be) a running star He could be running for exercise running he could be running for exercise分析一下句子结构 特别是could be running The man could be running for exercise.为什么用running而不是run 谢啦在线 He might be running _____(catch)a bus. swimming,running and doing morning exercises____you (be good wants be he running a star to连词成句 program is already running this system!can't be runing