什么是分别心:请问在这句话“I get up early on Sundays”中，Sundays作为副词，前面怎么能加介词on呢？谢谢

请问在这句话“I get up early on Sundays”中，Sundays作为副词，前面怎么能加介词on呢？谢谢 I get up at six. (如何提问) "hey,no one get up so early" 这句话是什么意思？ go or get up or down the street. 这句话是什么意思? 请问这是歌的名字是什么“I get knock down, but i get up again, you'll never going to kick me down” One reason I like to go to school on foot is the physical exercise I get from it. 这句话错在哪呢？ 谁有i should get up的歌词 I comeing up so you better get this ball get light modules from FAW，请问谁知道这句话是什么意思？ I had worked deep into the night,so I hated to get up the next morning.