Modal verbs are easy to spot because there are so few of them. In addition to must, shall, will, should, would, can, could, may and might, we can add ought to and have to. If we are told that we 'must ...

How many 'blue' phrases do you know? Learn three more here.

Exceptions to spelling rules are common on both sides of the Atlantic. Therefore, when in doubt, the UOC recommends using the preferred spellings provided in the Oxford Dictionary for British English ...