Please have patience is the correct sentence.
yes
would you pass me the sugar please
The proper form is "Please spare me from..." or simply "Spare me your..."
As part of a sentence, "what your plans are" is correct. For example, "Please let me know what your plans are" is a perfectly good sentence. If, however, you are asking whether "what your plans are" is a correct sentence by itself, it is not. If it is intended as a question, it should be "What are your plans?"
Yes, it is typically a word that we use to politely ask someone to do something.
Yes, that is correct.
Is this sentence correct? "Please keep this door closed"
He tried all his teachers' patience.
The correct grammar for the sentence is: "Please note that this letter is merely an inquiry regarding your interest and availability."
Nope. The correct way would be Who wants me to about them? Please raise your hands.
There is nothing grammatically wrong with the sentence "We were wondering."
yes
are unknown
yes its correct to use thank you for your assiduous patience
would you pass me the sugar please
No.
Please compose a complete sentence.