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MODALS TO EXPRESS POSSIBILITY

Could, might, may

Can

Present/ future possibilities (the time is understood from the context, don't change)

- She might be there in an hour.

- He may be sad, his dad didn´t come.

Past possibilities

with may/might you are making a guess, with could you know what happened

could/might/may + have + past participle

- She may have told me, but I wasn´t paying attention.

Past negative possibilities

may/might

+

not

+

have

+

past participle

- He may not have eaten yet, I'll prepare him a sandwich.

Present/ future possibilities (the time is understood from the context, don't change)

Used for general possibilities

- for many people

- in many places

at many times

Used for specific possibilities.

- one person

- one place

- one time

For negative we add "not​​​​​​​" after de modal verb. Meaning that the statement is not true or it won´t happen. We only use may or might.

- It could be a problemn if you don´t fill out the form.

- She may not have enough money for the pizaza right now.

There is no negative for general possibilities

- You can be very annoying when things aren´t like you want.

- It can be dangerous going down for those streets.

- It can be very awful when she gets mad.