As an English teacher, I have been creating content for both Korean learners and global English learners. This blog is where I share the grammar rules I cover in my lessons — and today’s quiz is about two ways to talk about the future that most learners mix up: will and going to. They look similar, but native speakers choose between them automatically based on the situation.
No rules first. Just the quiz. 🎯
Quiz Time!
Question 1: “Look at those clouds. It _____ rain.”
a) will b) is going to
Question 2: “I promise I _____ call you tonight.”
a) am going to b) will
Question 3: “We _____ visit Paris next summer. We already booked the tickets.”
a) will b) are going to
Question 4: “Don’t worry, I _____ help you with that right now.”
a) will b) am going to
Question 5: “She _____ quit her job. She told me last week.”
a) will b) is going to
Answers
- is going to — you can see the evidence right now
- will — a spontaneous promise made in the moment
- are going to — already planned and decided
- will — a spontaneous decision made right now
- is going to — already decided before this moment
How did you do? Let’s break down exactly when to use each one.
When to use WILL
Use will for decisions, promises, and predictions you make in the moment — with no prior plan and no clear evidence.
- “I’ll get the door!” (decided right now)
- “I promise I’ll be there.” (a promise)
- “I think it will snow tomorrow.” (a prediction, just a feeling)
- “Don’t worry, I’ll help you.” (offering on the spot)
If the decision happens as you speak, it’s almost always will.
When to use GOING TO
Use going to for plans you’ve already decided before now, and for predictions based on evidence you can see.
- “We’re going to travel next month.” (already planned)
- “She’s going to have a baby.” (you can see it / you already know)
- “Look at that car — it’s going to crash!” (evidence right in front of you)
- “I’m going to study medicine.” (a decision made earlier)
If it was decided before the conversation, or you can see proof, it’s going to.
Common mistakes to avoid
Don’t use will when you already have a plan — “I will travel next month (already booked)” sounds unnatural; native speakers say “I’m going to travel.” And don’t use going to for a decision you make on the spot — if the phone rings and you decide to answer, you say “I’ll get it,” not “I’m going to get it.” When in doubt, ask yourself: Did I plan this before, or am I deciding right now?
Quick recap
WILL = spontaneous decisions, promises, predictions (no evidence).
GOING TO = plans already made, predictions with visible evidence.
Quick test: “I’ll answer the phone” (decide now) vs. “I’m going to call her later” (already planned)! 📞
Is there a grammar point or English expression you’ve always wanted to know? Drop it in the comments below — I’d love to cover it in my next post!
— Yehs Sam | Turtle Zeus 🐢⚡ Slow but surely, we get there.
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