Modal verbs go before a main verb to show how likely or necessary something is. Will shows certainty: It will be dark by nine. Might, may and could show possibility: It might rain.
Must shows necessity: You must wear a seatbelt. Should gives advice: You should drink more water. Can shows ability: She can swim. May I and could you are polite ways to ask.
Modal verbs are always followed by the base form of the verb: must go, not must to go.
Worked example
Which modal shows the strongest certainty? “It ___ rain later.” (might / will / could)
- Might and could mean it is possible.
- Will means it is certain.
Answer:will
Key words
- modal verb
- a helping verb that shows possibility or necessity
- certainty
- being sure
- possibility
- something that could happen
Practise this
New questions every time.
Common Core-referenced: L.4.1c