FLOWER OF INTELLIGENCE

Mrs. Puff: I will free next week. :(

(+) S + will/shall/be going to + v-1 + O + adverb of time
(-) S + will/shall/be going to + not + O + adverb of time
(?) Will/shall/be going to + S + v-1 + O + adverb of time

Example:
She will help me next week.
I will not be here tomorrow
Shall we go to school?

Usage

To expresses future time. When the speaker is making a prediction, either will or be going to is possible.
Example:
I will go to Kandahar.
It is going to be rainy tomorrow.

To expresses a prior plan. When the speaker is expressing a prior plan (because he/she has made a plan or decision to do it) only be going to is used.
Example:
Why did you packing? I’m going to my hometown tomorrow.
I’m going to clean this house, because my parent will come.

To express willingness use will.
Example:
She’s coming. I will take her bag.
A: I don’t understand this.
B: I will help you.


Frequently used adverb
Tomorrow, next week/month/year, later

Note:
Shall usually used for I and we