they did their homework after dinner否定句一般疑问句对划线部分提问 划线部分是 after dinner

问题描述:

they did their homework after dinner否定句一般疑问句对划线部分提问 划线部分是 after dinner

否定句:They didn't do their homework after dinner. 一般疑问句:Did they do their homework after dinner?划线提问:When did they do their homework?