Re: question about article a or an
Hello and welcome to the forums.
The rule to using A or AN is to look at the first SOUND in the word that follows. You cannot go by the letter - some vowels have a consonant sound and some have a vowel sound.
If it starts with an uh, eh, ih, a, ee, etc sound, it's a vowel sound.
The U is the most confusing for most learners.
An umbrella, but a university -- because university starts with a yoo sounds, not an uhh sound.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.