The differences between Phrase, Clause and Sentence

Phrase: *a group of words without a Subject and Predicate. 
e.g - look ahead, take care of, along with, because of
*Also stand together as a conceptual unit, typically forming component of a clause.
e.g - His favourite phrase is 'It's a pleasure'.
     - 'No money, no honey' is a common phrase among young people.


Clause: * a group of words with a Subject and Predicate, subordinate or modify to another clause *( Subordinate Clause/ Main Clause).
e.g - If you meet him on the way, give him the letter.
     - Unless you buy it, somebody else will.
     - In case something happens, get me on +9511603051.
     - Delegates were delighted, since better protection of rhino reserves will help protect other rare species.


Sentence:* a set of words that is complete in itself, typically containing a Subject and Predicate.
e.g - Life should be safeguarded by wisdom.
    - Do you believe in God?
    - She is very fond of cats.
    - Money rules the world.