1. Mr. Grey walks in the woods every morning.
(?): Does Mr. Grey walk in the woods every morning?
(-): Mr. Grey doesn't walk in the woods every morning.
2. His son is swimming in the lake now.
(?): Is his son swimming in the lake now?
(-): His son isn't swimming in the lake now.
3. The dog became a domestic animal many years ago.
(?): Did the dog become a domestic animal many years ago?
(-): The dog didn't become a domestic animal many years ago.
4. There are many clouds in the sky.
(?): Are there many clouds in the sky?
(-): There aren't many clouds in the sky.