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My thinking became that functional requirements should use must because, If a derived object shall exist all its functionality must function. – ... ... <看更多>

Modal Verbs for English by IELTSXpress Can Could May Might Must Ought to Shall Should Will #ielts #ieltsxpress #ieltscanada #ieltsvocab #ieltsgrammar ... ... <看更多>

"Modal verbs (can, could, shall, should, will, would, may, might, must) function only as auxiliary verbs" (Biber et. al. 104). They do not take... ... <看更多>