Modal

Question 1

Can

Answer 1

Ability,possibility, permission
99% sure

Question 2

Could

Answer 2

Can in the past ( Ability,possibility, permission )
99% sure

Question 3

May

Answer 3

Uncertainty,possibility, permission

50% sure he may be

( polite request) only I or we
May I borrow your pen ?

Question 4

Might

Answer 4

Similaire to May ( possibility, uncertainty )

50%sure might be

Polite request (rare)

Question 5

Must

Answer 5

Nécessite, or strong necessity
95% sure
( Négative) prohibition

Question 6

Should

Answer 6

Advisability, expectation
90%
I should study tonight

Question 7

Would

Answer 7

Polite request, preference, hypothetical situation ( can use to express an habit ) to express past situation or States, only used to , ( not would), is possible

Question 8

Will

Answer 8

Futur action, promise, willingness
100%

Question 9

Had better

Answer 9

Advisability with Threat of bad result

Question 10

Shall

Answer 10

Is used to indicate futur action or event, suggestions,command
Polite question to make a suggestion

Question 11

Ougth to

Answer 11

Advisability, expectation
90%