Don't let me catch you doing that again.do为什么加ing呢?能不能不加呢.

Don't let me catch you doing that again.do为什么加ing呢?能不能不加呢.
Don't let me catch you doing that again.do为什么加ing呢?能不能不加呢.

Don't let me catch you doing that again.do为什么加ing呢?能不能不加呢.
catch sb.doing sth.抓到某人做某事.固定用法,必须加ing,不能不加

.catch sb doing sth 抓到某人做某事. 固定用法吧