So that I wouldn't be late for work again, I set my alarm-clock ahead half an hour.
A sentence can have just one word, so "No." can be a sentence.
No, you do not always need to put a comma after the word "so" if it is the first word in a sentence. It depends on the context and flow of the sentence.
In the sentence given, "so" is an adjective.
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.
yes it depends on the sentence.
so who cares that you need a a sentence begging with so
You just made a sentence with intelligent in it, and so did I in this sentence.
He did so and so and did so and so as well.
An interrogative sentence with the word gloomy would be, "Why are you so gloomy today?"
she is so incessant
I was so helenistic
your so stupid