Start with a real moment.
A friend asks about your weekend. “I’m going to visit my sister” presents an intention. “I’m visiting her on Saturday” presents an arrangement. “I’ll call her now” can be a decision made as you speak. These forms overlap, so think about the meaning you want to emphasise.
See how the sentence works.
Subject + be going to + base verb
Read the sentence as one idea, then notice the job each part does.
Understand the choices.
Will often expresses a spontaneous decision, offer, promise or prediction: “I’ll carry that.” It is not the only way to talk about the future. Use will + base verb, without to.
Be going to often presents an intention already formed, or a prediction based on present evidence: “Look at those clouds. It’s going to rain.” Keep the correct form of be: I am, she is, we are.
The present continuous can describe a future arrangement with a time or context: “We’re meeting at six.” The present simple often describes schedules: “The train leaves at six.” These are useful tendencies, not rigid rules that make every alternative wrong.
Useful sentences, in context.
I’ll answer the door.
An immediate offer made at the moment.
We’re going to save for a longer trip.
An intention, even without fixed bookings.
I’m seeing the dentist on Thursday.
The time and arrangement are established.
A small change makes a difference.
AvoidI will to call you.
UseI will call you.
Will is a modal and is followed directly by the base verb.
A MOMENT TO PRACTISE
Your turn.
Choose an answer, then check the explanation. There is no timer and nothing to sign up for.
TAKE IT INTO YOUR DAY
Make it yours.
Write an intention, a booked arrangement and a spontaneous offer. Include enough context to make your choice of form clear.
Further reading · British Council LearnEnglish
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