Choosing a Future Form: Will, Going To, Continuous, Perfect

There is no single future tense in English. There is a set of forms, and picking the right one communicates something the words themselves do not.

The five you need

will + verb — decisions made now, offers, promises, predictions with no evidence

I'll get it. · It will probably rain.

going to + verb — prior plans, and predictions with present evidence

We're going to move in June. (decided already)

Look at those clouds — it's going to pour. (evidence right now)

present continuous — fixed arrangements, usually with another person

I'm meeting the client at four. (in the diary)

present simple — timetables and schedules

The train leaves at 6:40. · The conference starts on Monday.

future continuous (will be + -ing) — in progress at a future moment

This time tomorrow I'll be flying to Oslo.

future perfect (will have + participle) — finished before a future point

By December we'll have completed the migration.

Three more that carry precise meaning

be about to — imminent, in the next moments.

Don't call now — they're about to start.

be due to — scheduled by someone else, often with a hint that it may slip.

The report is due to be published in May.

be to + verb — formal instruction or arrangement, common in written notices and news.

All staff are to report to reception. · The Prime Minister is to visit Berlin.

future perfect continuous — how long something will have been running.

By June I'll have been working here for ten years.

Future in the past

When you look forward from a point in the past, each form shifts back one step:

• I was going to call you, but I ran out of time. (a plan that didn't happen)
• She said she would be late. (will → would)
• We were about to leave when the phone rang.

Was going to is especially useful — it is the standard way to describe an intention that came to nothing.

The distinctions that carry meaning

will vs going to — when was the decision made?

The phone's ringing. — I'll answer it. (deciding now)

Why are you holding the phone? — I'm going to call Ana. (decided earlier)

going to vs present continuous — intention vs arrangement.

I'm going to see the dentist. (I intend to)

I'm seeing the dentist at nine. (booked)

future continuous for tact. This is a professional register point:

Will you be joining us? is softer than Will you join us? — it asks about the plan rather than requesting a commitment.

Grading your certainty

Adverbs go after will and before won't — a small position rule that catches people out.

Certainty	Example
high	It will definitely be ready.
likely	It'll probably be ready.
unlikely	It probably won't be ready. (not "won't probably")
hedged	It may well be delayed.

After time words, no future form

when, as soon as, before, after, until, once take the present, even about the future.

❌ I'll call you when I will arrive. ✅ I'll call you when I arrive.

Choose by what you're signalling, not by the time — every one of these forms can describe next Tuesday. What differs is whether you're announcing a decision, reporting a booking, quoting a timetable, or softening a request.

Confirming a visit

A: Are you coming to the Berlin office next week?

B: I'm flying out Tuesday — the flight leaves at seven. I was going to come Monday, but it got too expensive.

A: Will you be seeing the client while you're there?

B: Probably. By Friday I'll have met most of the team.

Arrangement, timetable, abandoned plan, tactful enquiry and future perfect — five forms, one trip.

Test yourself

The quiz below turns on the distinctions rather than the forms.