Older textbooks often refer to 'will' as 'the future tense' and
this has confused a lot of learners. It is important to remember
that when we talk about the future we cannot always use 'will'
and that when we use 'will' we are not always talking about the
future. Here 'will' is clearly referring to the future. In these
examples, however, 'will' is referring to events happening at
the present. When we use 'will' referring to the present, the
idea being expressed is usually one of 'showing willingness' or
'will power'. We use 'will' for requests, orders, invitations
and offers. We use 'will' to make promises or threats. We use
'will' for habit. We use 'will' for deduction. Look again at all
of these examples of 'will'. They are all to do with the present
or are 'timeless'.