What is the common noun in the sentence we ate good food all week, too.

"We".

Explanation:

A common noun is a noun (Person, place, or thing) that isn't like proper nouns, and that isn't capitalized.

We, unless used at the beginning of a sentence, shouldn't be capitalized.

For example:

Yesterday, we ate waffles.

Yesterday, We ate waffles.

Which sentence is correct? The first one. This is true because, "we" isn't a proper noun, therefore it shouldn't be capitalized unless put in the start of a sentence.

A proper noun is a noun (person, place, or thing) that is specific.

For example, a common noun would be:

While some proper nouns are:

Names would often be a proper noun, because they are always capitalized, no matter where they are in a sentence, and they are always talking about a specific person, place, or thing.

it is grammatically incorrect and is illegible to me and i can not answer it.