be good at studying 中的studing用原形study还是studying.因为study本身也有名词性,我用的原形,老师给我加了ing,

be good at studying 中的studing用原形study还是studying.因为study本身也有名词性,我用的原形,老师给我加了ing, be good at造句 用be good at be good at 造句 be good at 词性 be good at+什么? Be good at+__ be good at be good at this Are you good at s----?Yes ,I like studying be good at 和 be good with be good for,be good at, 有关英语 he is good at math and he_____hard这里可以用 is always studying吗,并说下 be always doing的用法 they are doing better in English now是DO BETTER IN 的现在进行时,请问大家be good at有现在进行时吗或者,比如I am good at studying English,就是 现在进行时?,如果不对, 用be good at造句. be good at 怎么用? be good at 等于什么? be good at的近义词