No, except at the beginning of a sentence because it is
n
ot a proper
n
ou
n.
No, but if you named the purple amethyst Shelly, then it would be capitalized.
No, first frost would not be capitalized
Yes, it would be capitalized
No unless it is at the beginng of the sentence
No it shouldn't be capitalized.
Yes, PC would be capitalized.
Yes, Siamese would be capitalized.
No, except at the beginning of a sentence because it is n ot a proper n ou n.
He foresaw the exodus to the suburbs in the 1950s and capitalized on it by developing suburban shopping centers
They are not proper nouns. They would not be capitalized in a sentence.
Bond business would not be capitalized unless it is the name of a specific business.
All words in a title are capitalized except the articles, prepositio ns, a nd co nju nctio ns. Would should be capitalized while at is a prepositio n so it should not be capitalized.