What is exactly the difference between Verb and Predicate ? could anybody please tell me clearly and give each example of both ? Thank you.
A verb is a word class. And subject and predicate are the two main parts of a sentence. The predicate consists of a verb and its object(s) or when the verb is a linking verb as to be of verb and complement.
About.com has an article about the grammar term predicate.
A sentence makes a statement, a complete statement, and consists of the two parts, subject and predicate. The subject is the part about which a statement is made (a person, a thing, something abstract) and the predicate is the part that contains what is said about the subject.
Grammars today tend to avoid the term predicate. Sentences are often analysed as subject verb object or subject verb complement.
In this type of analysis the term verb, which is a word class, is used as sentence part, which actually is improper use of a grammar term. It would be better to use a new term eg verbal part. But often grammar terms are not used with the same precision as in mathematics.
The predicate of a sentence is the verb and its objects, complements, and modifiers (if any). Look at these example sentences:
John is sleeping. [The verb and predicate are identical: is sleeping.]
Mary likes coffee. [The verb is likes. The predicate is likes coffee.]
Sally takes her coffee with cream and sugar. [The verb is takes. The predicate is takes her coffee with cream and sugar.]