为什么是our helping?

为什么是our helping? Thanks for helping us with our math中helping为什么是ing形式? Thanks for helping me.为什么是helping many people find happiness in helping others.为什么要用helping,是什 helping others is helping us 还是helping others is helping our Thanks for helping me为什么填helping Is technology helping or harming our society? i find helping others is happy 为什么用helping i think it helps中的help为什么是helps而不是is helping? would he like helping us with our English?改错 love ,our ,I ,my ,mother ,cook ,meals ,helping thanks to your helping 还是help?为什么、