The future continuous: will be + -ing
| Use | Example |
|---|
| an action in progress at a time in the future | Tomorrow afternoon, I'll be painting the kitchen. |
| an action in progress when something else happens (when + present simple) | When you get home, I'll still be working. |
| something that will happen as a normal part of events | I'll be passing the post office anyway, so I can mail it for you. |
| a polite question about someone's plans | Will you be staying for dinner? (Will you stay for dinner? sounds more like an invitation.) |
Negative: won't be + -ing. Verbs for states (know, want, believe, own, belong) don't usually take -ing: I'll know tomorrow. After when, before, after, until and as soon as, use the present simple: when you get home.
be about to and be due to
| Form | Meaning | Example |
|---|
| be about to + verb | very soon, in the next few moments (no exact time) | Quick, the bus is about to leave! |
| was / were about to + verb | it was going to happen very soon (often it didn't) | I was about to text you when you called. |
| be due to + verb | planned or expected at a particular time | The new subway line is due to open next year. |
| be due (+ a time) | expected, or must be paid or handed in, at that time | The baby is due in March. The rent is due on the first. |
Don't mix up be due to + verb (scheduled) and due to + noun (because of): The game was canceled due to the rain. And don't use an exact time with be about to: not The train is about to leave at six.