Except on a specified condition; if not
"Can you use cruel in a sentence?" is a sentence, so yes, unless you mean something else?
One sneeze does not mean that you have swine flu, unless you are a hypochondriac.
no you should not unless it is at the begging of the sentence!
No, except at the beginning of a sentence because it is not a proper noun.
Death!Unless your talking about a prison sentence.
not unless it is the first word of the sentence
You will get no pudding unless you eat your salad.
Depending on the sentence, not unless could be the correct form.
No, unless it is at the start of a sentence.
No, unless it's at the beginning of a sentence.
Unless anyone writes a better answer this is all your going to get.
Unless it is at the beginning of a sentence, then it is not capitalised.