Modal Verbs

What modal is used for obligation?

• Can

• May

• Must

• Should

What modal is used for ability?

• Can

• Should

• Must

• Could

What modal is for advice?

• Could

• Should

• Can

• Have to

What modal is used for rules, instructions?

• Might

• Must

• Can

• Have to

What modal is used for probability?

• Might

• Have to

• Should

• Must

What modal is used for permission?

• Could

• Can

• Have to

• May

What modal is used for Past ability, past permission, request?

• Could

• Have to

• Must

• Can