Key things to remember:
All sentences are made up of two parts: a "complete subject" and "complete predicate".
The "complete subject" will be at the beginning of the sentence and will name "who" or "what" the sentence is about. Stop after you include the important noun; do not put the verb in your subject!
The "complete predicate" will tell you about your subject. It will be the rest of the sentece after the subject. "Complete predicates" usually start with action verbs but sometimes start with those little verbs such as: is, are, was, were, has, have, and had.