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1. A/AN

1.1. Examples A

1.1.1. I am a good student

1.1.2. She is a young woman

1.1.3. He is a pilot

1.2. Examples AN

1.2.1. It is an egg

1.2.2. It is an ugly hotel

1.2.3. It is an easy question

2. Form of application of indefinite articles

2.1. A: Is used in front of words that begin with consonant

2.2. AN: used in front of words beginning with vowel