1. the whole class laughed loudly at the story. complete subject complete predicate
2. now identify the simple subject and simple predicate. the whole class laughed loudly at the story. simple subject simple predicate
3. now identify the simple subject and simple predicate. twelve hours passed without a word from any of the group. simple subject simple predicate
4. identify the complete subject and the complete predicate in the following sentence. the workmen repaired the dam.

1. S: The whole class. P: laughed loudly at the story

2. S: class P: laughed

3. S: hours P: passed

4. S: The workmen P: repaired the dam

The subject of the sentence is who or what the sentence is about. In sentence number 1 and 2, the sentence is about "The whole class". The complete subject contains the specific subject and any modifiers connected to it. "The" and "whole" are adjectives that modify class so these are part of the complete subject. However, the simple subject is the subject without modifiers, so for the simple subject you would only put "class". The predicate is the rest of the sentence. It includes the verb phrase and any extra information. The sentence for 1 and 2 has the complete predicate as "laughed loudly at the store". The verb phrase is "laughed" so this is the simple predicate.

the reason some people sacrifice their own life for another person's life could be that they are in love with them and would do anything to keep them safe a protected even if that means risking their life in the process