studying还是studing?

studying,studing,study中,study的过去分词,现在分词,动名词是什么?单三式呢 she ＿＿ in a high school A.studying B.teaching c,is studing d 英语：I am studing.那么加上“好好”,是I am good good studing.还是I am good for study English还是for studying English always study english 还是 always studying english 是The plan of study abroad 还是The plan of studing abroad? iIspend every minute i can后面跟to study还是studing i am studing 是keep study hard还是keep studying hard? there were about 50 foreign students studying chinese还是study 是make progress in study 还是make progress in studying? 是 the importance of study 还是 the importance of studying