By Images, Definite articles

Hi,Can you please tell me why a person use an indefinite article before a gerund/verbal noun? I think here people are making an instance of all the gerund/verbal noun "a playing" and not making types of it. Like I have said in the thread named "indefinite article before a...

I have a little pronunciation problem: Some times I hear in sentences that the indefinite article "a" is pronounced / / and other times /ej/ e.g. "a man who is sick can't work" What is the proper, correct or educated pronunciation of the I.A. "a"Thank you in advance!!!!!A.

Numbers 1 and 3 are correct. Note that the abbreviation 'UFO' starts with a consonant sound: .