The subject and predicate: A complete thought
In English, every sentence needs two parts. The subject and the predicate.
The dog runs down the street
Subject predicate
without these two parts, the sentence is not a complete thought.
They must be in this order as well.
The Subject: The Naming Part
The subject of a sentence is who or what the sentence is about. The subject is a noun. A noun is any person place or thing.
The dog runs down the street
Subject
The Predicate: The Telling Part
The predicate of a sentence tells what the subject is doing. It will start with a verb and contain the object （a noun）.
The dog runs down the street
Verb + Object
"runs down the street" is the predicate. This tells us what the dog (subject) is doing.
The Basic Sentence: Subject + Verb + Object
Now we can build basic English sentences. Knowing only the rules about the subject and predicate.
A basic English sentence is
Subject predicate (Verb + Object)
The dog runs down the street