Nice sentence! Let's make it sound better and check the grammar step by step.
Corrected versions:
- Option 1 (simple): The anthill you see looks like a roof. Under the ground is a whole town of tunnels.
- Option 2 (another good way): The anthill you see is like a roof. Below the ground is a whole town of tunnels.
Why these are better (easy steps):
- "Looks like" or "is like" — both are okay. "Looks like" is a little clearer for young writers: it tells us what something seems to be.
- Remove the comma after "Below the ground." For short beginnings like "Under the ground" or "Below the ground," we usually do not need a comma. So we write: Below the ground is a whole town of tunnels.
- Make the noun phrase natural: "a whole town of tunnels" sounds clearer than "a whole tunnel town." We put "town" as the main word and say what kind of town it is (a town full of tunnels).
- Word order: "Under the ground is a whole town of tunnels" sounds natural and keeps the main idea together (where? + what?).
One more quick tip: "Whole" goes before the noun it describes: "a whole town" not "town whole."
Want a fun practice? Try fixing this sentence the same way: "The nest you see is like a hill. Under the sand, are many tiny rooms."