how a, an ,the use in a sentence or please discuss some guidelines and notes for using a, an, the.
an apple an eraser an ice cream an orange an umbrella
Notice that an depends on the first sound not letter. Thus, we write
an honest man ... an hour ago .... an S-shaped pipe ....
For the rest of the sounds, we use (a) like a book, a pen etc.
Generally, when we write sentences, we use either (a) or (an) for things mentioned for the first time. However, if they are mentioned again, we write (the) For example, You need two eggs to make a cake. First, you break the eggs ...
Notice that the indef articles (a,an) used for countable nouns.
On the contrary, (the) is used for countable and uncountable nouns
I hope I answered your Q
a, an are indefinite articles that can be used for singular countable nouns.
" a" is used when the article followed by consenont :
book: a book
mobile: a mobile
"an" is used when the article followed by a vowel. the vowels are : ( a,e,i,o,u) :
orange: an orange
e-mail: an e-mail.
these articles can't be used in plural countable nouns:
the article ( the) is called definite article that can be used when we have things specified.:
the apple/s on John's hand.
the girl in blue dress.
I hope that now the point is clear.