When a subject consists of more than one word, there is always one key word that is the main part of the subject. This key word is called a simple subject.

• The lady sitting in front smiled sweetly.
• The players from Zamboanga City arrived early.

In the above sentences, lady and players are the key words as they are the nouns that perform the action. Therefore, lady and players are the simple subjects.

The simple subject and all other words that add more information to it form a complete subject.

Hence, The lady sitting in front and The players from Zamboanga are the complete subjects.

• Prohibited drugs and alcohol can ruin a bright future.
• Best friends, Freddie and Art of Team B competed in Guam last summer.

In the above sentences, the key words or the nouns that perform the actions are drugs and alcohol and Freddie and Art.

In both sentences, the subject is composed of two nouns. These are called compound subjects.

All the highlighted words in the subject form the complete subject.