How do we make the Simple Future Tense?

The structure of the simple future tense is:

subject+auxiliary verb WILL+main verb
invariablebase
willV1

For negative sentences in the simple future tense, we insert not between the auxiliary verb and main verb. For question sentences, we exchange the subject and auxiliary verb. Look at these example sentences with the simple future tense:

 subjectauxiliary verbmain verb 
+Iwill openthe door.
+Youwill finishbefore me.
-Shewillnotbeat school tomorrow.
-Wewillnotleaveyet.
?Willyou arriveon time?
?Willthey wantdinner?

When we use the simple future tense in speaking, we often contract the subject and auxiliary verb:

I willI'll
you willyou'll
he will
she will
it will		he'll
she'll
it'll
we willwe'll
they willthey'll

For negative sentences in the simple future tense, we contract with won't, like this:

I will notI won't
you will notyou won't
he will not
she will not
it will not		he won't
she won't
it won't
we will notwe won't
they will notthey won't

How do we use the Simple Future Tense?

No Plan

We use the simple future tense when there is no plan or decision to do something before we speak. We make the decision spontaneously at the time of speaking. Look at these examples:

In these examples, we had no firm plan before speaking. The decision is made at the time of speaking.

We often use the simple future tense with the verb to think before it:

Prediction

We often use the simple future tense to make a prediction about the future. Again, there is no firm plan. We are saying what we think will happen. Here are some examples:

Be

When the main verb is be, we can use the simple future tense even if we have a firm plan or decision before speaking. Examples:

Note that when we have a plan or intention to do something in the future, we usually use other tenses or expressions, such as the present continuous tense or going to.