新概念2第81课 Then,jumping into the car

问题描述:

新概念2第81课 Then,jumping into the car
jump为什么要加ing
还有新概念2第79课,After taking off,这句的take为什么要加ing
新概念2第81课 Then,jumping into the car

做主语
after是介词,后跟名词或动名词