Contraction of "shall not"
i shall convey you
I shall praise Him
You shall not covet your neighbours wife. Means you shall not have a desire to have her even in lust.
you shall be mine is the meaning
shall we/I throw it
'Shall Not' and 'Will Not' have two wholly different meaning. Won't and Shan't are the constricted abbreviations of the words. Shalln't is bad english and simply wrong. As to Won't, that's not the same meaning.
"Shan't" is a contraction of "shall not," used to express refusal or intention not to do something.
The usual rule given for the use of shall and will is that where the meaning is one of simple futurity, shall is used for the first person of the verb and will for the second and third: I shall go tomorrow; they will be there now. Where the meaning involves command, obligation, or determination, the positions are reversed: it shall be done; I will definitely go. However, shall has come to be largely neglected in favour of will, which has become the commonest form of the future in all three persons."shall" is a modal auxiliary, used to express a command / exhortation or what is likely to happen in the future. So, there isn't a present tense of the auxiliary verb "Shall"
This shall also pass, stresses on the This. This being the object or law etc, and it is what will happen. This also shall pass, stresses on the also meaning as well as and is not a single object but an add on to something else.
"Will" conveys an intent to do something. For contracts, the word "will" is replaced with "shall" to convey the meaning that it is something that is required. "The builder shall deliver on the 1st."
No. "Should" means one ought to do something. The meaning of "shall" depends upon the subject: if the subject is "I" or "we", "shall" means "I or we intend to" do something; if the subject is "you" or "he, she, it or they", shall means the person or persons "must" do something. "I shall go to the store" means that I intend to go to the store. "You shall go to the store" means that you must go to the store.