School starts at 9:00.为什么school前不加the?名词前不应该加定冠词或不定冠词吗?school又不是专有名词或者不可数名词?

School starts at nine o'clock. school starts at nine ten否定句 School starts at 9:00 every day 改成关于9：00的疑问句怎么改啊 My ideal school starts at 9 a.m( 对画线部分提问)(9 a.m) My ideal school starts at (9a.m) 对括号内提问 My idesl school starts at （9a.m.)对括号内提问 School starts at eight o'clock改一般疑问句 The school day starts at eight every day The school bay starts at eight every morning是什么意思 School starts at nine o'clock.（改为一般疑问句） School starts at nine o'clock变一般疑问句 school starts at nine o'clock什么意思 School starts at eight thirty.改为同义句 School starts at eight thirty.（改为同义句） At around eight o'clock,l go to school school starts at nine o'clock. School starts at 9:00.为什么school前不加the?名词前不应该加定冠词或不定冠词吗?school又不是专有名词或者不可数名词? School starts around 9a.m.and ends about 3.30p.m.为什么这里时间前不用加at? School starts (at eight) every morning就括号部分提问——school start every morning