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'be serious' in a sentence

Learn how to use 'be serious' with 11 example sentences.


  • I'm sorry. I didn't think you were serious.
  • You can't be serious.
  • He's serious about his work.
  • You should be serious about your health.
  • I don't think it's serious.
  • Who says sentences have to be serious?
  • Our financial problems are serious.
  • She indicated that the problem was serious.
  • There will be serious consequences.
  • I know it was serious.
  • She is serious when she talks about her hobby.
  • Words near 'be serious' in the dictionary