Question

1. A beaver tail is a big,flat bread.
2. A beaver tail is big, flat bread.
3. Beaver tails are big, flat bread.
4. Beaver tails are a big, flat bread.
5. Beaver tails are big, flat breads.
6. Beaver tails are big and flat.
7. beaver tails are big, flat.

(Which expressions are grammatical?)

Answer 1

1. A beaver tail is a big,flat bread. <b>no</b>
2. A beaver tail is big, flat bread. <b>no</b>
3. Beaver tails are big, flat bread. <b>no</b>
4. Beaver tails are a big, flat bread. <b>no</b>
5. Beaver tails are big, flat breads. <b>no</b>
6. Beaver tails are big and flat. <b>yes</b>
7. beaver tails are big, flat. <b>no</b>

You could make 1-5 correct by writing the sentence like this:

Beaver tails are like big, flat pieces of bread.