How to use A, AN, THERE IS and THERE ARE

How to use A, AN, THERE IS and THERE ARE A. Use a for words with the sound of a consonant. EXAMPLE: A TELEVISION AN. Use an for a words with the sound of a vocal. EXAMPLE: AN UMBRELLA THERE IS: Use THERE IS for when we speak in singular. EXAMPLE: THERE IS A BALL THERE ARE: USE THERE ARE for when we speak in plural. EXAMPLE: THERE ARE FOUR BALLS