We use ‘will’ to talk about the future.
SUBJECT+WILL+BASE FORM OF A VERB
You will miss the sale if you don’t buy the sweater today.
If you don’t buy the sweater today, you will miss the sale.
SUBJECT+WILL+NOT (or WON’T) + BASE FORM OF A VERB
John won’t buy clothing made of polyester.
WILL+SUBJECT+BASE FORM OF A VERB
Will you come here and tell me if these jeans are flattering?
Some things to remember about ‘will’:
1.) The form doesn’t change, regardless of the subject. It is always: SUBJECT+WILL+BASE FORM OF A VERB.
2.) You can make contractions with the subject and ‘will’:
I will = I’ll
you will = you’ll
he will = he’ll
she will = she’ll
it will = it’ll
we will = we’ll
they will = they’ll
3.) The contraction of WILL+NOT is WON’T.
I won’t wear sandals this afternoon.
4.) We don’t use ‘to’ to separate ‘will’ and the verb that follows it.
to wear jeans.
5.) The form questions, flip the subject and ‘will’.
Will you use your cane if your knee hurts?
‘Will’ is a Modal Auxiliary Verb, like ‘can’, or ‘may’. All Modal Auxiliary Verbs follow the same structure.