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.
— Mister Micawber
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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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.)