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Going to is for plans already decided, will is for decisions you make right at the moment of speaking.
Written by Bryan López, Profesor de inglés · Updated
Going to and will both talk about the future, but they're not interchangeable. Going to is used for plans already decided before speaking and predictions with visible evidence. Will is used for spontaneous decisions and predictions based on opinion.
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Interactive exercises, real pronunciation, and the full lesson taught in English.
Ask yourself two things: did you already decide this before speaking, or are you deciding it right now? If you already decided, use going to; if you're deciding on the spot, use will. And for predictions: do you see concrete evidence right now, or is it just your opinion? With evidence, use going to; without it, use will.
In many languages, one phrase covers both plans already decided and spontaneous decisions, so it's common to use going to for everything, even when the decision is made right at the moment of speaking and should be will: "I'm thirsty, I'll get some water" (spontaneous decision, will), not "I'm going to get some water" unless you had already planned it.
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Going to is used for plans already decided and predictions with visible evidence. Will is used for spontaneous decisions and predictions based on opinion.
When you already decided something before speaking ("I'm going to travel next month") or when you see clear evidence of something ("Look, it's going to rain").
When you decide something right at the moment of speaking ("I'll answer that") or when you predict something based on your opinion, without solid evidence ("I think she will like it").
Yes, but with different nuances: going to with visible evidence right now, will with opinion and no clear evidence.
"I'm going to call her later" (already decided) vs. "Wait, I'll call her right now" (deciding in the moment).
Because in many languages one phrase covers both cases, while in English you have to choose based on whether the decision was already made or is being made on the spot.
Interactive exercises, real pronunciation, and the full lesson taught in English.