"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
No, "brother-in-law" is a common noun. It refers to the relationship between a person's sibling and their sibling's spouse.
No, the word "brother" is a common noun, not a proper noun. It is a general term used to refer to a male sibling.
April has a brother and a sister. Their names are Julius and May. Their parentswere born in Taiwan.The nouns in the sentences are:April - a proper noun, the name of a specific person;brother - a common noun, a general word for any male sibling;sister - a common noun, a general word for any female sibling;names - a common noun, a general word for what a person or thing is called;Julius - a proper noun, the name of a specific person;May - a proper noun, the name of a specific person;parents - a common noun, a general word for any mothers or fathers;Taiwan - a proper noun, the name of a specific place.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
When using the noun "Brother" as a noun of address, it is a proper noun as a word for the specific person you are addressing. The noun "brother" is a common noun as a general word for any male sibling.
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
it's a common noun. a proper noun would be Spider-Man.
Pencil proper or common noun
Proper noun or common noun