Do you say this seems or seem in English grammar plurals?

You would use "seems" when referring to a singular noun, and "seem" when referring to a plural noun or a collective noun.

Here's a breakdown:

* Singular noun: This seems like a good idea.

* Plural noun: These seem like good ideas.

* Collective noun: The team seems to be working well together.

The key is to look at the noun the verb is referring to and determine if it is singular or plural.