A cow ? gives us milk ?.
A and An are used before singular countable noun.
Phonology refers to the study of speech sounds of a given language and their function within the sound system. Phonetics is the study of speech process. Syntax and Morphology are sub-levels of the grammatical system.
Because egg gives vowel sound.
Articles "A" and "AN" are used with some expressions.
For example:
Make a noise, give a warning, have a pain, have a great education etc.
Little knowledge means almost no k knowledge.
The little knowledge means some knowledge.
He knows something that's why his knowledge proved a boon for him in getting job.
Usually Article the is used for Nationalty.
Like, The Chinese, The Japanese, The Indian
Who is used for human beings.
If we had had Salman in our team, we would have won the match.
اگر ہماری ٹیم میں سلمان ہوتا تو ہم میچ جیت جاتے۔