these is a sentence: "the cat ran into the kitchen when he heard the can open." I have a question,why not use "opened" instead of "open"?

  • This is the same answer as in this question. A verb of perception (like heard) should be followed by a bare infinitive (like open). – Canadian Yankee Apr 10 '19 at 4:13
  • @CanadianYankee There's nothing wrong with following it with being opened or opening. – Jason Bassford Apr 10 '19 at 4:40
  • @CanadianYankee thank u, very useful – h3xi4oy1 Apr 10 '19 at 9:12
  • @JasonBassford - You are correct, and use of the -ing form is covered in the link in my previous comment. – Canadian Yankee Apr 10 '19 at 15:33

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