modal showing future willingness

prediction based on evidence

subordinate conditional clause

unusual certainty

timetabled event

planned event

prediction based on past experience

spontaneous decision

non-future modal use of will for deduction

'going to' future

The comet returns every 20 years.

You are taking the examination here.

Do you think so? I'll look it up.

That bull's going to charge.

The examination takes place here.

He'll never agree

The deposit is returnable providing the house is left clean

I will explain it to you clearly

The damp will be caused by poor plasterwork

The future fulfilment of the present