Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
--------
Question: A teacher can ask whether a student know the answer to a question.

Answer: A body can ask whether a student know the answer to a question .


Question: If you help to purchase a cellular grant then you should have enough money .

Answer: If you don to purchase a cellular phone then you should have enough money .


Question: Clouds can prevent you from seeing into the sky.

Answer:
Clouds can shut you from seeing into the garden .