A and An
Incorrect: He bought a umbrella yesterday.
Correct : He bought an umbrella yesterday.
Incorrect: It has been raining for a hour.
Correct . It has been raining for an hour.
Incorrect : There is an university in Alan.
Correct : There is a university in Alan.
Note : "An' is used before a vowel or a silent “h” (as in hour, heir, honest). If the vowel “U” is pronounced like you', we use “a” before it.
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