The verb to do · Conjugation
Future Simple of do
The answer: will do
A2
A decision made now, a promise or a prediction.
Quick answer
The Future Simple of the verb to do is will do.
Example: I will do the dishes tomorrow.
Full conjugation in the Future Simple
| Pronoun | Form | Contraction |
|---|---|---|
| I | will do | I'll do |
| You | will do | You'll do |
| He / She / It | will do | He'll / She'll / It'll do |
| We | will do | We'll do |
| You (pl.) | will do | You'll do |
| They | will do | They'll do |
Common mistakes to avoid
1. I will to do ❌
After will, use the base form, with no to: I will do. Will never takes -s, and the verb after it has no -s either. Say she will do, not she wills do or she will does.
2. I will can do ❌
Will is a modal verb (a helper verb like can, must or should). Two modal verbs cannot go together. Use will be able to for can: I will be able to do. Use will have to for must: I will have to do.
3. When I will arrive, I will call you ❌
After when, if, before, after and as soon as, use the Present Simple for the future, not will. Say When I arrive, I will call you. Will goes in the other part of the sentence.
Practice quiz
Going further
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Frequently asked questions
How do you conjugate do in the Future Simple?+
Use will + the base form (the verb with no to): will do. The form is the same for every person: I will do, she will do, they will do. In speech, will often becomes 'll: I'll do.
When do you use the Future Simple of do?+
Use will for a decision you make at the moment of speaking: The phone is ringing. I'll answer it. Also use it for a promise (I'll help you.) and for a prediction (I think it will rain.).
Is it will or going to?+
Use going to for a plan you made before you speak: I'm going to visit my grandma on Sunday. Use will for a decision you make now: I'm hungry. I'll make a sandwich. With do: I'm going to do (a plan), I'll do (a decision now).
How do you make the negative of do in the Future Simple?+
Use will not + the base form, or the short form won't: I won't do, she won't do. Careful with the spelling: the short form is won't, not willn't.
How do you make a question with do in the Future Simple?+
Put will before the subject: Will you do…?, When will she do…? The main verb stays in the base form, with no -s and no to. Short answers: Yes, I will. / No, I won't.
Related pages: do Future Simple
Pages on a similar topic or with a similar use, so you can keep exploring.
Updated on 12 November 2026 by the Big Challenge teaching team. Every year, more than 500,000 students across Europe take part in our English contest, created in 1999. Our teaching approach →
The Big Challenge · Updated on 12 November 2026 · Source: www.thebigchallenge.com/bl/academy/learn-english/verbs/do/future-simple
© The Big Challenge. Copying allowed for classroom use. Every year, more than 500,000 students across Europe take part in our English contest, created in 1999.
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More forms of the verb to do are coming soon.