Yesterday I went to the department store,where I met my teacher.这里的逗号能去掉吗?为什么?

I went to a library yesterday I went to a toy shop yesterday. I went to work( )foot yesterday. i went to collect my photographs yesterday. I went to guangzhou yesterday 哪有错 i went to the hotel on foot yesterday i ________ _________ ________back to the hotel yesterday 为什么I went to school yesterday为什么不写成i did go to school yesterday呢? I went to blood donation yesterday中文什么意思? went to park I bike by yesterday 连词成句越快越好, I went to the park yesterday 意思是什么 I went to a library yesterday 改为一般疑问句 Yesterday I and mother went to the supermarket went I zoo the to yesterday （连词成句） I went to the beach yesterday变为一般疑问句 WHERE___________________________YOU GO YESTERDAY?I WENT TO THE CINEMAWERE OR DID 一般过去式的疑问句i went to the park yesterday I went to school yesterday 变疑问和否定 i went to the parlc yesterday.变一般疑问句