1. 含有 be 动词（am/is/are/was/were）
直接在 be 动词后加 not：
• He is happy. → He is not (isn't) happy.
• They were late. → They were not (weren't) late.
2. 含有情态动词（can, will, must, should, may...）
直接在情态动词后加 not：
• She can swim. → She cannot swim.（注意 can not 通常合写 cannot）
• You should go. → You should not (shouldn't) go.
3只有实义动词（最常见）
借助助动词 do/does+ not，动词用原形：
• I like coffee. → I do not (don't) like coffee.
• He likes coffee. → He does not (doesn't) like coffee.（注意 likes 变回 like）
口诀：有 be/情态/助动词，not 直接跟在后；只有实义动词，请 do 来帮忙。
文章来源：
四季读书网
版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容， 请发送邮件至23467321@qq.com举报，一经查实，本站将立刻删除;如已特别标注为本站原创文章的，转载时请以链接形式注明文章出处，谢谢！
