Subject and Predicate

The subject in grammar is the agent (the 'doer') in an active sentence such as: Alan kissed Jane.

However, there is a difficulty. The following two sentences are identical in meaning:

• Our children planted a tree
• A tree was planted by our children.

Only in the first sentence is our children the grammatical subject. So there is a difference between the logical subject and the grammatical subject. Also, many sentences have no subject, for instance:

• Come here!
• Identifying the thief may take some time.

If a sentence does have a subject, then the rest of the sentence may be called the predicate. These two parts make a sentence complete.

Examples:

The large car stopped outside our house.

The large car = subject

Outside our house = predicate.


source: wikipedia