请教一下do does did 的用法。跪求！！！！！！！！！！！！！！

显示全部楼层 · 2012-8-17 10:44:34

你好，同学你说的这些词都是助动词，do用在一般现在时的除了第三人称单数以外的所有人称的疑问句，否定句中，如Do you go to school by bike every day? Do they have lunch at 12 every day?No, they don't. （ don't= do not.) does用在一般现在时第三人称单数时的疑问句，否定句中，如Does he like swimming?Does she have English class every day?Tom doen't go to school by bus.did 用在过去时的疑问句和否定句中，如...

千问 · 2012-8-17 10:44:34

do和does是一般现在时的助动词， did是一般过去时的助动词，does 用于第三人称，而do是第一人称，用于疑问句 eg，How do you know the answer? How does she know the answer? Where did he go yesterday?...