- can
- can noun.Can is the word generally used in BrE for the container when the contents are liquid (a can of beer / a can of soup). When the contents are solid, tin is more usual (a tin of beans / a tin of peaches) but can is used for this too in AmE.————————can verb.The verb can is classed among the modal verbs, and has a wide range of uses, expressing (1) possibility, (2) ability, (3) permission (where it overlaps with may).Examples:(1) possibilityAnyone can make a mistake / Manned spacecraft can now link up with other spacecraft in outer space / He can be very trying.(2) abilityHis four-year-old son can already ride a bicycle / Murray could read more than forty languages.(3) permissionNo one can play the organ without the consent of the vicar / Can I speak to your supervisor, please? In more formal or polite contexts, may is preferable and more usual, e.g. May I have another sandwich, please?. However, in the past tense, could has largely replaced might, e.g. At that time only rectors could [= were entitled to] receive tithes. In some cases, a distinction between can and may needs to be preserved, e.g. I'll drop in tomorrow, if I can [= if I am able, if I have the time, etc.] and I'll drop in tomorrow, if I may [= if you will permit me, if that is convenient for you, etc.].
Modern English usage. 2014.