we often have lunch at school 这里为什么用have

we often have lunch at school 这里为什么用have .You often have lunch at school,______? He often has lunch at school .()()he often have lunch? We always (have)lunch at school we ( )(now have) lunch at school. 改错：We have our lunch at school. we must have lunch at school. I often have lunch at school.(用now换often改写句子) i often have lunch at school.改为一般疑问句 They often have lunch at school.改为一般疑问句 we have (a) good lunch at home.为什么用a He often —— （have) lunch at school.But now he ——（have） lunch