The Subject Element of a Clause

In statements, the subject element usually appears before the verb:

Snow fell hard.

And after the first verb in questions:

Is she really going to wear that?

In third person present tense, the subject controls whether the verb is singular or plural:

He sees you.       They see you. 

The subject also controls how certain objects and complements are formed:

I slapped myself. He slapped himself. They slapped themselves. 

Amy's my friend. Amy and Holly are my friends. 

What Can be a Subject?

Noun phrases, including single nouns:

James ran fast. The bus was on time. Steak, ale, and cake are available. 

Pronouns:

I like pumas. That interests me. Who owns this?

Some subordinate clauses:

What she did was out of order. Where you live doesn't count. 

When you string a list of nouns together, they form one subject in the clause, rather than separating them out. For example:

Amy, Alina, and John were laughing. 

            (S)                     (V)      (C)

This isn't S + S + S + V + C, but rather S + V + C