Question

I saw an pretty bird sitting on an window sill
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Answer 1

Answer:

I also watch many birds sitting on the window stilllllll.....

ok hi mate

how are u and please stay safe

Answer 2

Answer:

I saw a pretty bird on a window sill.

NOTE:

“A” is used before words starting in consonant sounds and “an” is used before words starting with vowel sounds. It doesn't matter if the word is an adjective, a noun, an adverb, or anything else; the rule is exactly the same.

in this sentence,

pretty starts with p so it is a consonant, we add a instead of an

whereas,window starts with w and also is a consonant so we add a instead of an

GOOD TO KNOW!