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Anonymous Posted 14 years ago
Vocabulary

"....is key"

Is the expression of "something is key" a fixed expression?
I mean no matter how many subjects/matters you're referring to, the to-be verb remains singular?
Because I've heard "exercise and diet IS key" and alike.
  

Top answer

Yes, a semi-fixed expression. 'Key' in this phrase is an adjective. 'Something', however, can be singular or plural.

  • Yes, a semi-fixed expression.
  • 'Key' in this phrase is an adjective.
  • 'Something', however, can be singular or plural.
  • Exercise and diet is key to..
  • ) Exercise and diet are key to..
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1 Answers
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Yes, a semi-fixed expression. 'Key' in this phrase is an adjective. 'Something', however, can be singular or plural.

Exercise and diet is key to... (The speaker is considering the 2 a single effort.)
Exercise and diet are key to... (The speaker is considering the 2 as separate activities.)

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