4.122 WARNING

You cannot use 'can' or 'could' to say that someone or something will have a particular ability in the future. Instead you use 'be able to' or 'be possible to'.

'Be able to' and 'be possible to' can also be used to talk about someone's ability to do something in the present or the past.

'Be able to' and 'be possible to' are dealt with in paragraphs 4.228 to 4.235.