Question

if the wrong word is used below, change it. if there is no error, click \submit answer.\ the weatherman could not have known that it would snow on alberto scorfanos birthday.

Explanation:

The sentence is grammatically correct as it uses the modal verb phrase "could not have" appropriately to express that the weatherman was unable to know the future event (snow on Alberto Scorfano's birthday) in the past. There is no wrong word, so we click "Submit Answer".

Answer:

Submit Answer (the sentence has no error)