I needed help with my homework.这个句子的help为什么不用加ing?

help me with my homework help each other with homework 为什么介词用with 而不用on 之类的? I can help kids with swimming中swimming为什么要加ing I still need______hands to help me with my homework. I need some ____(help) with my homework. we can call it for help为什么help不用加ing help...with...句型 help sb with sth sth里的动词要不要加ing? she can help me with my homework的同义句 这个句子是什么时态Last october the famers needed help with the apple help me with my homework,( )you 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?