Yes, it can. "Neither ABC nor XYZ can/should/are/etc. ...".
The word 'the' is capitalized when it is the first word in a sentence (as the beginning of this sentence) or part of a title ("The Last Supper" or "The Cat In The Hat") . The first word in a sentence or title is always capitalized.
Using the word "then" at the beginning of a sentence is not incorrect. However, it does not make a sentence complete. A complete sentence must have, at a minimum, a subject and a verb. "Then" is neither of those.
No, it should only be capitalized if it forms part of a title or is the beginning of a sentence.
Sure, as long as the beginning word has a capitalized first letter.
Never. ANSWER: only if the word is the beginning word in the sentence.
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.
if you mean from the beginning of a sentence yes then you would have to anyway because its at the beginning of the sentence anyway.always capitalize the first word of a quotation if needed.
Only if it is the first word in the sentence. Chinese yen are similar to US dollars.
neither tom or Jim went to the park.
It is possible to have a sentence with the word it at the beginning, as this sentence proves.
Always start the beginning of a sentence with a capital letter.
No, except at the beginning of a sentence because it is not a proper noun.