Are the below given sentences written correctly?

Question

1. He's slow as a tortoise.
2. It's ugly as monkey.
3. She's as weak as a kitty.
4. She's fast as a horse.
Kindly send me the correctly written sentences
.

Answer 1

I'd put "as" for the 2nd word in sentences 1, 2, and 4, just before the adjective -- as sentence 3 is written.

I'd also put "a" in front of "monkey" in sentence 2.

Otherwise, they're fine.