8th Graders - Modal verbs

Wonderful people, we are now studying the MODAL VERBS.
You shouldn't forget about certain things, such as:

• no "s" in the 3rd person singular
• in the interrogative form we need "Inversion" (May I .....?)
• Modal + verb in the infinitive
• the meaning of the modal verb depends on the context of the sentence.

A. Ability

can/can't/cannot/could (Present/future)

could/couldn't/could not (Past)

She can play piano.

They can't study alone.

B. Possibility

may/ might/could/ may not/ might not/ could not/ couldn't (Present/future)

might have/ may have / could have (past)

Jane might go to the party.

Jess may win the competition.

C. Permission

can/can´t/ may/ may not

Teacher, sorry I'm late. May I come in?

Dad, can I go to the party?

D. Certainty/ Obligation

must/ mustn't/ must not (present/ future)

must have (past)

You must obey the school's rules.

Tomorow you have a Maths test. You must study!

E. Advice

should/ shouldn't (present/ future)

should have (past)

I think you should talk to them.

Should he go to the doctor?