Thanks all for your reply,
I still do not understand the concept..(How the grammar rules works.)
Some people say: - a 12 week course, 12 weeks course, 12 week course... I am confused.
Can anyone please tell what the grammar rule is and how to identify which one I need to apply? Please explain using examples.
Also please tell me, how can I identify, a word in a sentence is noun or adjective phrase? any simple technique?
for example : We spent three months in France .. in this sentence how I know three months is noun or adjective phrase?