I oftengo to school on foot.我经常走路去上学. I am going to school on foot.我正在走路去上学. I will go to school on foot.我将要走路去上学. I went to school on foot.我曾走路去上学. I am not go to school on foot.我不是走路去上学. Are you go to school on foot?你是走路去上学吗? How do you go to school?你是怎么去上学的?
I often chat with my friends. I am chatting with my friends . I will chat with my friends. I chatted with my friends (yesterday). I am not chat with my friends. Are you chatting with your friends? What do you usually do?