My mother often cooks delicious food after whating it.为什么有-ing形式?

my mother often teaches me how____(cook) i often cook with my mother.对often提问 I often help my mother cook a meal on Sunday. My mother often cook dinner at6：00.根据答句写问题 I often cook with my mother.（划线部分提问）划在often I was often madeto makea fireto cook dinner by my mother翻译I was often made to make a fire to cook dinner by my mother My mother uses___to cook the dishes.(cook) My mother often ____ (cook) for us ,but she doesn't ____ (wash) the dishes 填空 最上面那个是：My sister often helps my mother co最上面那个是：My sister often helps my mother cook dinner(改为一般疑问句) II.用所给动词的适当形式填空 1.My father often helps my mother ________(cook). I..(help)my mother cook next Monday She often helps her mother cook supper.(改为同义句）She often ) her mother ) supper. while my mother ________(cook).I am doing my homework. when sb.do sth.还是 when sb.doing sth.如When my mother ________(cook) meals for us in the kitchen I often go there to help her. My mother likes ____.she___many delicious food yesterday.(cook) 我看网上许多人回答这样help my mother cook , my mother may ---（busy）---（cook)the meals my son likes doing some-------（cook） with his mother