Incisiveness is the noun of the incisive adjective, but in this sentence:

Communication has to be incisive.

It seems to me that Incisiveness doesn't work here, and incisive sounds correct, although grammatically the wrong part?

  • Why do you think it is wrong? Commented Jun 6, 2015 at 6:51

2 Answers 2


It is not the wrong part.

"Incisive" in your sentence is a predicate adjective. The "to be" attaches the subject ("communication") to its modifier ("incisive").

This is a very common construction in English.

This site http://examples.yourdictionary.com/examples-of-predicate-adjectives.html shows many examples. Your textbook probably also dicusses predicate adjectives.


I think that the sentence is perfectly right.

Communication has to be incisive.

Though the adjective(incisive) is not placed anywhere close to the noun(communication), the attribute of 'incisiveness' automatically belongs to 'communication'.

Like in the sentence: Your speech must be clear or Her speech is fluent.

If you still feel incisiveness is better, you may try this: Incisiveness in communication is what everyone should aim for.

Let me know if I've answered your question as you expected(because I didn't understand why you felt the sentence has a grammatical error).


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