Future Simple Tense: Forming Sentences with Will and Going To

Overview

The future simple tense covers actions, states, and events that have not happened yet. English has more than one way to express the future, but the two most common structures at the A2 level are will and going to. Both refer to future time, yet they are not freely interchangeable. Choosing the wrong one can change the meaning of a sentence in ways that feel unnatural to a native speaker.

Will is followed by the base form of the verb and stays the same for every person. Going to uses the correct form of to be plus going to plus the base form of the verb. The structural rules are simple. The more important skill is knowing which structure fits the situation.

Forming the Future Simple Tense with Will

Affirmative Sentences

Place will between the subject and the base form of the main verb. Will never changes regardless of the subject. The contraction 'll is common in spoken English and informal writing.

Negative Sentences

The negative form is will not, contracted to won't. The main verb stays in its base form.

Questions with Will

For yes/no questions, will moves to the front of the sentence before the subject.

Information questions begin with a question word, then will, then the subject.

Forming the Future with Going To

Affirmative Sentences

The going to structure uses the present tense of to be (am, is, or are) followed by going to and the base form of the main verb. Unlike will, the form of to be changes according to the subject.

Negative Sentences

Add not after the verb to be. The contractions isn't and aren't are common in speech.

Questions with Going To

For yes/no questions, the correct form of to be moves to the front of the sentence.

Information questions follow the same pattern with a question word at the front.

When to Use Will and When to Use Going To

Predictions and Spontaneous Decisions: Will

Will is the natural choice for predictions based on general knowledge or opinion, and for decisions made at the moment of speaking rather than in advance.

Plans and Intentions: Going To

Going to signals that a decision was made before the moment of speaking. It conveys intention or a plan that already exists. It is also used for predictions supported by clear present evidence.

Side-by-Side Comparison

Time Expressions Used with the Future Simple Tense

These time expressions signal future time and appear naturally with both will and going to.

Time expressions do not determine whether to use will or going to. That choice depends on meaning.

Both are grammatically correct. The difference is whether the call is a spontaneous offer or a pre-existing plan.

Common Mistakes to Avoid

Mistake 1: Adding S or Ed to the Main Verb After Will

After will, the main verb must be in its base form. Adding s or ed is a transfer error from present or past tense habits.

Mistake 2: Mixing Will and Going To Into One Structure

Will and going to are two separate structures. Combining elements of both is ungrammatical.

Mistake 3: Forgetting To Be in Going To Sentences

Going to requires the correct form of to be. Missing it or using the wrong form is a common error.

Mistake 4: Using Will for Evidence-Based Predictions

When visible present evidence points clearly to a future outcome, going to is the more natural choice. Note: using will here is not strictly wrong, but going to sounds more immediate and grounded in what is actually happening.

Mistake 5: Forming Questions Without Moving Will or To Be

In questions, will must move to the front of the sentence. With going to, the verb to be moves to the front. Leaving either in statement position produces the wrong word order.

Mistake 6: Using Going To for Spontaneous Offers

When offering to do something on impulse, will is the right choice. Going to implies a prior plan, which sounds unnatural in the moment.

Practice Exercises

Exercise 1: Choose the Correct Form

Choose will or going to to complete each sentence. More than one answer may be possible; choose the most natural option based on context.

1. I haven't decided yet, but I think I _______ (will / am going to) take the afternoon train.
2. She already bought the tickets. She _______ (will / is going to) see the exhibition on Saturday.
3. The phone is ringing. I _______ (will / am going to) get it.
4. Look at that pile of work. It _______ (will / is going to) take all day.
5. He probably _______ (will / is going to) need more information before deciding.
6. They _______ (will / are going to) move to a new office. The lease is already signed.

Exercise 2: Complete the Sentence

Write the correct form of will or going to using the verb in brackets.

1. She _______ (call) you as soon as she lands.
2. We _______ (not / attend) the conference this year.
3. _______ (you / help) me carry these boxes?
4. He _______ (present) his proposal to the board next Thursday. He has been preparing for weeks.
5. _______ (they / be) at the event this evening?
6. I _______ (not / accept) those terms under any circumstances.
7. It _______ (be) a long journey, so pack enough food.
8. She _______ (apply) for the grant. She submitted the form this morning.

Exercise 3: Correct the Error

Each sentence contains one error. Rewrite the sentence correctly.

1. She will calls her manager after the meeting.
2. They will going to expand the team next quarter.
3. He going to lead the workshop on Tuesday.
4. Are you will attend the training session?
5. Look at the forecast. It will definitely raining tonight.
6. I'm going to answer that. (Said spontaneously when a phone rings.)

Summary

Use will when something is decided in the moment or when you are making a general prediction. Use going to when a plan already exists or when present evidence points clearly to what comes next. That one distinction covers most of what you need from this tense.