Yes, T-shirt is correct.
It is not necessary to capitalise the 't' in t-shirt. It is not a proper noun, but just a common noun. Capitalisation is not necessary even though the t-shirt was so named because it resembles a capital T.
No, the word "smartphone" should not be capitalized unless it is at the beginning of a sentence.
No, the word "epitaph" should not be capitalized unless it is at the beginning of a sentence or part of a title.
The word "banker" should not be capitalized unless it is at the beginning of a sentence or part of a title.
No, the word "rif" is not always capitalized. It should only be capitalized if it is part of a proper noun or at the beginning of a sentence.
No, the word "fifteen" should not be capitalized in a date within a sentence unless it is the first word of the sentence.
The word 'will' should be capitalized only when it is a person's name or the first word in a sentence. As a verb or common noun, it should not be capitalized.
As an abbreviation it should be capitalized.
Yes, Sunday should always be capitalized.
The second word should not be capitalized
No, the word "smartphone" should not be capitalized unless it is at the beginning of a sentence.
No, the word "epitaph" should not be capitalized unless it is at the beginning of a sentence or part of a title.
The word "banker" should not be capitalized unless it is at the beginning of a sentence or part of a title.
Yes, Greek should be capitalized.
Yes it should be capitalized.
No it shouldn't be capitalized.
Yes it should be capitalized.
Yes Capitalized