By six o’clock I will be gone.为什么是被动语态呢

I get up( )six o'clock. By six o’clock I will be gone.为什么是被动语态呢 I can't get home ( until/by ) six today.But I'll be back by seven o'clock I I get up at six o'clock. I get up at six o'clock.-----------------I go to school at seven o'clock.--------------- I usually go to school on six o'clock.找错 It's six o'clock.I __(get)up now. i get up at( )six o'clock填什么? I ____(come) home at four o' clock,but Jim_____(come) back at six o' clock. I must go home at six o'clock?就划线部分提问,划线部分是at six o'clock I usually get up at six o'clock.(对画线部分提问）at six o'clock 划线 I get up at half past six o'clock对划线部分提问画线部分：half past six o'clock I got up at six o'clock yesterday 对 six oclock 提问 we__the work by six o,clock yesterday evening.A.had finished B.finished. By six'o clock in the afternoon,the manager finished all his work哪里错? by ten o'clock 对划线部分提问：I get up at six o'clock 划线部分：at s对划线部分提问：I get up at six o'clock 划线部分：at six o'clock _ _ _ you get up? I have to be home by 10 o'clock(对10 o'clock 提问）