A predicate is the part of a sentence, or a clause, that tells what the subject is doing or what the subject is.

One key limitation is that it applies only to atomic propositions. There is no way to talk about properties that apply to categories of objects, or about relationships between those properties. That’s what predicate logic is for.

To negate a sequence of nested quantifiers, you flip each quantifier in the sequence and then negate the predicate. So the negation of ∀x ∃y : P(x, y) is ∃x ∀y : P(x, y) and So the negation of ∃x ∀y : P(x, y) and ∀x ∃y : P(x, y). Again, after some thought, this make sense intuitively.

A compound predicate gives two or more details about the same subject and has two or more verbs joined by a conjunction. For example: “She visited her cousins and met all their friends.” In this example, “she” is the subject and “visited” and “met” are the predicates joined by the conjunction “and”.

Examples of Predicate Nominatives John was a policeman. A dog is man’s best friend. (A predicate nominative can also be a noun phrase, i.e., a noun made up of more than one word.) She will be the fairy.

A verb is a word class. And subject and predicate are the two main parts of a sentence. The predicate consists of a verb and its object(s) or when the verb is a linking verb as to be of verb and complement. A sentence makes a statement, a complete statement, and consists of the two parts, subject and predicate.

The simple subject tells who sleeps late on the weekends. The simple predicate tells what the subject is doing. It is just the verb without any other words that describe or modify it. Her best friend sleeps.

Simple Subjects and Simple Predicates The simple subject is the key word or words in the complete subject. It is usually a noun or a pronoun. • The simple predicate is the key word or words in the complete predicate. It is always a verb.

Simple Predicate

1. Sometimes a subject has many words that modify or describe it.
2. A simple subject is a subject that has just one noun or pronoun as the focus of the sentence.
3. A predicate can also have many words.
4. The simple predicate is the verb or verbs that are connected to the subject.

The simple subject is only who or what is “doing” the verb, without any modifiers. Simple Subject Examples: Thomas Edison invented the light bulb. In this sentence, “Thomas Edison” is “doing” the verb, “invented.”