A clause is a group of related word that contains a subject as well as a verb. A clause is a meaningful combination of words, as it can, alone, express a complete thought. A clause can be a simple sentence. Hence, clause is also sometimes defined as group of words having a subject and predicate.

1. Good Morning
Children

2. Cows graze in groves on grass
which grows in grooves

3. CLAUSE
 A clause is a group of words that contain a
subject and a predicate, and forms part of a
sentence.
 Eg: If I were rich, my life would
change completely.
 A sentence may have one or more than once
clause
 All the clause expresses conditions one event
followed the other.
 It can change its word order.

4. PROBABLE CONDITION
Frank will play the DJ if the
others bring along their CDs.
If Caroline and Sue prepare the
salad, Phil will decorate the house.

5. IMPROBABLE CONDITION
If I owned a lonely island, I would
build a huge house by the beach.
If I played the lottery, I would have a
chance to hit the jackpot.

6. IMPOSSIBLE CONDITION
She would have been sorry if she had
missed it
I would have been so angry if he had
said that to me