1️⃣ Can / Could
• Can → ability, permission, possibility.
o I can swim. (ability)
o Can I come in? (permission)
• Could → past ability, polite permission, possibility.
o When I was young, I could run fast.
Trick: Can = present, Could = past / polite.
2️⃣ May / Might
• May → permission, possibility.
o You may leave now.
o It may rain today.
• Might → weaker possibility.
o He might be late.
Trick: May = strong chance, Might = weak chance.
3️⃣ Shall / Should
• Shall → future (I/we), suggestion, offer.
o I shall help you.
o Shall we go out?
• Should → duty, advice, expectation.
o You should study well.
o He should be here by now.
Trick: Shall = will (I/we), Should = advice/duty.
• Can → ability, permission, possibility.
o I can swim. (ability)
o Can I come in? (permission)
• Could → past ability, polite permission, possibility.
o When I was young, I could run fast.
Trick: Can = present, Could = past / polite.
2️⃣ May / Might
• May → permission, possibility.
o You may leave now.
o It may rain today.
• Might → weaker possibility.
o He might be late.
Trick: May = strong chance, Might = weak chance.
3️⃣ Shall / Should
• Shall → future (I/we), suggestion, offer.
o I shall help you.
o Shall we go out?
• Should → duty, advice, expectation.
o You should study well.
o He should be here by now.
Trick: Shall = will (I/we), Should = advice/duty.
