I'm walking.我在吃饭/I'm not walking.我没有在吃饭/Are you walking? 你在吃饭吗 It's raining now.现在在下雨/It's not raining now.现在没在下雨/Is it raining now?现在在下雨吗 He's working.他在工作/He's not working.他没在工作/Is he working? 他在工作吗? She's sleeping.她在睡觉/She's not sleeping.她没在睡觉/Is she sleeping? 她在睡觉吗 They are eating.他们在吃饭/They aren't eating.他们没在吃饭/Are the eating?他们在吃饭吗