I was at home on Saturday.home 前面为什么不用定冠词the?

I was at home on Saturday.home 前面为什么不用定冠词the? I was at home on saturday moring 改为一般疑问句 I usually stay home at night.stay home 中home前面为什么不用加at? i was at church on Sunday.church前面为什么不用the The students will study at home on computers this Saturday.( on my arrival home 中on为什么不用at It was at 11olock that i arrived home.为什么用that 不用when at home 和at church中间为什么不用加the Yesterday I was ( )home. A.at B.in C.on at school / at home为什么不加定冠词The?另外,有那些常见的介词用法? during the ride home这里的 home 前面为什么不用加介词 I don't stay at home on saturday often.的同义句是什么?