I saw a sentence on the internet like this:

We found it difficult to judge from wrong.

Is it right to use adjective wrong after preposition from?

I wonder about that. Because I learned that noun only can be used after a preposition.

Can adjective be used after preposition?

  • No: preps take complements of may kinds. "I stayed [until after lunch]" (preposition phrase); "It won't last [for long]" (adverb phrase); "I left [because *I was tired]" (clause); "I regard her [as a friend]" (predicative). – BillJ Jun 11 '17 at 6:58
  • "A small cloud of smoke rose from the glass and the colour of the liquid changed from red to purple, and from purple to a watery green".What about this sentence or "from bad to worse"? – V.V. Jun 11 '17 at 7:32
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    I doubt that you saw this sentence "on the internet" as you have quoted it. You are more likely to have seen the sentence "We found it difficult to judge right from wrong." In any case, as BillJ says, prepositions can take many kinds of complements, including adjectives like wrong. Are you familiar with the definite and indefinite articles (the and a) in English? It might be wise to concentrate on such basic matters at this early stage of your study. – P. E. Dant Jun 11 '17 at 7:37
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    @V.V. The circumpositions "from...to" have "bad" and "worse" as their objects, but there, "bad" and "worse" are so-called "small clauses", and we can understand the phrase so: "went from [being] bad to [being] worse". – Tᴚoɯɐuo Jun 11 '17 at 12:27

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