2. This has both simple and continuous forms, and refers to time, which we look back at from a future point.
In two years' time 1' ll have finished this book. By the end of the month, I'll have been working for this firm for a year. 3. It can also be used to express an assumption on the part of the speaker.
You won't have heard the news, of course.
(I assume you have not heard the news.)
This is used to describe formal arrangements.
All students are to assemble in the hall at 9.00. Be about to, be on the point of, be due to
Be about to and be on the point - both refer to the next moment.
I think the play is about to start now. Mary is on the point of resigning. Be due to refers to scheduled times.
The play is due to start in five minutes. Ann's flight is due at 6.20. 5.4 Present simple and present perfect Present simple is used to refer to future time in future time clauses.
When we get there, we'll have dinner. Present perfect can also be used instead of present simple when the completion of the event is emphasized.
When we've had a rest, we'll go out. Present simple is also used to describe fixed events, which are not simply the wishes of the speaker.
Tom retires in three years. Similarly, calendar references use the present simple.
Christmas is on a Tuesday next year.
