EF4/5 Modals- modal auxiliaries

Subject + modal + infinitive -to (simple form of the verb)

Mary + might + to like + ice cream.
Mary might like ice cream.

The little boy should go to bed at 8:30.

My daughter must finish her math homework.

May I open the door?


Yes, you may (open the door).


Please, may I to redo the test tomorrow?

do redo
paint repaint
heat reheat
place replace

Your aunt should replace her dentures.
After you fill your car with gas, replace the nozzle.

read reread
write rewrite
new renew
view review
turn return
fund $ refund

shall- "I shall finish the work." VERY UNUSUAL

Shall is for a polite invitation to do something
"Shall we leave?"
"Shall we eat?"
"Shall we take a break?"

TWO MODALS TOGETHER
I will be able to help you.
will- 
You must be able to run 5k to be on the team.
You might be able to attend the class.

TWO-WORD MODALS
ought to- should (advisability- advise)
You ought to to call your sister.

had better- really should - strong advise-
You had better go to the hospital.

have to/ need to- must
She has to stop smoking.
I have to stop smoking.
I have to stay here.
The dog has to stay home.
I need to call Shaw.
She needs to get a job.

have got to- must- very strong


used to- did something regularly in the past
He used to play hockey when he was young.
She used to live in Korea.

NOT MODAL
be used to- comfortable with something
She is used to NOUN
She is used to Vancouver now.
I am not used to Seattle.
I am not used to GERUND
I am not used to speaking English.

I am used to Chinese food.
I am used to eating sushi.

I am getting used to living in Vancouver.

He is used to
We are used to the rain.


THREE-WORD MODAL
be able to- can
She is not able to come to the meeting.
He is able to speak French.

be supposed to- should
You were supposed to call me.

be going to - will

She is going to make some supper.
She will make some supper. UNUSUAL
I am going to go skiing tomorrow.

I am going to the school. NOT A MODAL 
I am going to go to the school. MODAL

will? be going to? WHEN?

MY OPINION AS A NATIVE ENGLISH SPEAKER- IDIOMATIC

be going to -not sure 
I am going to pick you up at 3. SURE
I am planning to pick you up at 3. NOT SURE
I am not sure if I can pick you up or not.
He is not sure if he can pass the math class or not.