verb
[modal verb]
used to indicate that something is possible or probable
used to say that one thing is true but something else is also true
formal - used to indicate that something is allowed
formal - used to ask a question or make a request in a polite way
formal - used to express a wish
formal - used to make a polite suggestion
formal - used in various polite expressions with I
formal + old-fashioned - used to indicate the reason for something or the purpose of something
be that as it may
formal - used to introduce a statement that is somehow different from what has just been said