Future Simple Tense in English is used to predict the possible events, to express someone's willings, or to ask something.

In modern English "will" is preferred to "shall". You can use "shall" but only with the first person pronouns - "I" and "we".

Shall we read another funny story, grandson?

Shall I be able to invite you to the party?

What will be in the end?!

Look! She said it will be the greatest project ever...

Will you give me this book to read? It seems to be interesting.

I will sleep no more, than 2 minutes...

Zzz... Zzz...

She will complete cleaning her room soon.