肯定句: She teaches us Chinese.
否定句: She doesn't teach us Chinese.
一般疑问句: Does she teach you Chinese?
肯定句: My brother is playing the piano.
否定句: My brother isn't playing the piano.
一般疑问句: Is your brother playing the piano?
求
采纳
Does she teach you Chinese?
2 My mother is n’
打错
My mother isn't playing the piano.
Is your mother playing the piano ?
2 mother 都改为 brother