Must [2]
Assumption. Example- You have not been in your bed you must have been at a party
Would [1]
Past [ used to ]. Example- You would be with them if it wasn’t for your leg
Would [2]
Present [ unreal ]. Example- You would never get a girl.
Shall [1]
Offer. Example- You shall be placing the bid at 2.3 million.
Shall [2]
Contracted Obligation. Example- You shall be paid a third.
Could [1]
Unreal Ability. Example- You could have invisibility if you were smart
Could [2]
Past Ability. Example- You could be in the national basketball team if it wasn’t for your back