I'm doing my homework at home at night. 对划线部分提问 at home at n

When and where are you doing your homework?
注意这个地方,虽然原句是at home at night 提问时按照英语习惯,要说When and where,而不能说Where and when,
第二,当主语是第一人称时,就划线部分提问时,变一般疑问句要把第一人称I变为第二人称you