She has lunch at twenty t( 3 )twelve at school.In the aftern

She has lunch at twenty t( 3 )twelve at school.In the aftern She has lunch at school at twelve o'ciock. She has lunch at school at twelve.这个at在这什么意思,in at on用在什么情况? She has the lunch at school She has lunch at school at twelve o'clock.变一般疑问句 She has lunch at twelve的否定形式为什么是She doesn't have lunch at tw She has lunch at the school canteen.改为否定句 She usually has lunch (at school)? she has lunch at twelve o'clock.(改为特殊疑问句 lunch,she,at,twelve,has,usually,o'clock排列句子 She has lunch at twelve.改否定,快 改为一般疑问句：She has lunch at about twelve