LESSON X:

USING "A" OR "AN"

a + a word beginning with a = an ambulance

e = an emergency

i = an identification card

o = an office

u = an unknown child

a + a word beginning with all other letters = a bus stop

= a car

= a father

= a man

= a wife

= a Phone

In the office: an office a large office
At the emergency: an emergency a medical emergency
With the ambulance: an ambulance a licensed ambulance
The card: a card an identification card
The number: a number an insurance number
The day at work: a work day an emergency work day