Modal verb

Ability,request

• could

• might

• can

• have to

could

• offer,suggestion

• past ability,suggestion

• permission,future ability

• request,invitation

permission,future ability

• may

• will

• ought to

• shall

might

• offer,suggestion

• advice,prediction

• necessity or obligation

• present or future possibility

necessity or obligation

• will

• Must

• can

• would

ought to

• what's right or correct

• willingness,prediction

• request,invitation

• obligation

offer,suggestion

• could

• would

• shall

• have to

should

• advice,prediction

• ability,request

• permission,future ability

• past ability,suggestion

willingness,prediction

• might

• shall

• can

• will

would

• ability,requst

• present or future possibility

• request,invitation

• obligation