We wrote this out as a proper table and this is the information which was at each level.
starts with a capital letter
finishes with a full stop
can be a simple or complex sentence
THE SENTENCE
a thought,spoken or written
a statement, a question, an exclamation sentence
A SENTENCE/ A CLAUSE a simple sentence
a complex sentence
MAIN CLAUSE SUBORDINATE CLAUSE
The girl is playing in the garden, because the weather is good.
I read for my test, so that I would get a good grade.
Can be understoon alone. Explains, gives more detail about the main clause.
Cannot be understood without the main clause.