Corrected sentences:
Pumas hunt at night. They can jump as high as the roof of a two-storey building.
What I changed and why (easy steps):
- Start with a capital letter — "Pumas" already starts with a capital. Good!
- Periods at the end — each short sentence ends with a period. Good.
- Use "the roof" not "a roof" — We say "the roof of a two-storey building" to compare how high pumas can jump to a typical roof. "A roof of a two-storey building" sounds strange.
- Hyphen for "two-storey" — when the number and floor word describe the building together, we join them with a hyphen: "two-storey building." (In American English people often write "two-story building" instead.)
- Removed the extra "/" — that slash at the end was not needed, so I took it away.
Another way to say it (short):
Pumas are active at night. They can jump as high as the roof of a two-storey house.
Try this: Read the corrected sentences out loud. Can you point to the words that tell when ("at night") and how high ("as high as the roof")?