help people do with their tax forms.help是动词,为什么在此不加ing?

help...with...句型 help sb with sth sth里的动词要不要加ing? Can you help kids with swimming?swim为什么加ing 又为什么加with I am calling 110 for help now.for不是介词吗?为什么help不加ing? help sb With 后如为动词要加ing么 此处动词开头为什么不加ing 是因为她是祈使句吗? They do their homework,help their parents with housework,rea help后面加动词原型还是加ing形式 help sb.之后是加动词原级还是加ing形式? can you help me with swimming.请解释一下为什么要用ing形式,以及一些关于help,和要加 help sb with 后能跟动词ing吗? I can help kids with swimming中swimming为什么要加ing Robots will help people with their housework..同义句