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.

If you want to read a book then you should turn on the light.
If you want to read a book then you should slow on the light .

travel to the family shop for a hair cut .
Listen to the op shop for a hair cut .

You are likely to find a stone in a box .

You are likely to score a tick in a box .