I was home 和 I was at home 有什么不一样?I was home 和 I was at home 翻译过来有什么不一样?加介词的那句话和不加介词的那句话到底意思差在哪里?再此谢过！

I was sick.I was ______ home. I was back home和I was at home有什么区别? I was glad I was heading home.应该怎么翻译 I was reading a book at home.the telephone rang. I was walking home from a supermarket.什么意思? I was a teacher when I was I was stuck和I was I was a I was a I was a I was a 中文翻译 I was at home yesterday.(划线提问) I was at home last night.(否定) I was at home的意思是什么 I was at home yesterday.(划线提问) I was at home at that m______. I was home in the morning是什么意思 I was traveling home from Bangalore.翻译