Thus it is not yet possible to derive proper motions with PPM quality for all AC stars.
NO
No, a sentence can begin with any kind of word. The first letter of a sentence is always capitalized to mark the start of the individual sentence, not because the word is a proper noun.
Their is a word of possesion. Ex: That is Their ball.
No, the word basketball is not a proper noun and so it does not get capitalized in a sentence unless it is the first word of that sentence.
Not if it is to be a proper sentence.
NEVER
The proper noun in the sentence "Naveen is a good boy" is the word "Naveen."
a proper noun.The word is a proper noun.
No. The word prevent is a verb, not a proper noun.
'Bisters' is not a word, so I can't use it in a proper sentence.
No, except at the beginning of a sentence because it is not a proper noun.
Yes, you should capitalize the word "scurvy" if it is the first word in a sentence or if it is part of a proper noun or title.