Sentence

Definition

A sentence is a group of words that contains at least one subject and one verb. A sentence expresses a complete thought. A simple sentence has one subject and one verb. The subject tells who or what did something. The verb tells the action (or condition).

These are simple sentences:

Subject	Verb
I	study.
I	study and work.
My head	hurts.
My head and neck	hurt.
It	is raining.
The students	are reading.

(Notice that the subject in a simple sentence may be compound: My head and neck hurt. Also, the verb in a simple sentence may be compound: I study and work.)
NOTE: "Save your money" is also a complete sentence. The subject "you" is understood and not included.

Subject umumnya berupa kata benda (Noun), atau pengganti kata benda/orang (Pronoun), atau kata lain yang dibendakan (Gerund = kata kerja yang dibendakan, dan bisa juga to-infinitive). Noun dalam subject bisa hadir sendirian (single) atau dalam frasa kata benda (Noun Phrase).

Examples:

My bag is expensive	(Noun)
She likes apples.	(Pronoun)
Swimming makes me healhty.	(Gerund)
To err is human.	(to-infinitive)

Verbs adalah unsur inti dari predicate yang yang menceritakan kegiatan/ tindakan yang dilakukan oleh subject atau menceritakan tentang kondisi subject.