can
Put into Past Tense:
He can dance.
He could dance.
Put into Past Tense:
I may leave.
I was allowed to leave.
Put into Past Tense:
I must leave.
I had to leave.
Stay in Present Tense, but express differently:
I can read this.
I am able to read this.
Put into Past Tense Negation:
We can juggle.
We could not juggle.
Negate:
I may go to the party.
I may not go to the party.
Put into Future:
She must go to the dentist.
She will have to go to the dentist.
Stay in Present Tense, but express differently:
She must leave.
She has to leave.
Put into Future:
I can swim.
I will be able to swim.
Negate:
She may drive faster than 100 km here.
She must not drive faster here.
Negate:
You must do that again.
You need not (don´t have to) do that again.
Stay in Present Tense, but express differently:
We may go out.
We are allowed to go out.
Put into Future Negation:
You can read well.
You will not (won´t) be able to read well.
Put into Future:
We may have a tattoo.
We will be allowed to have a tattoo.
Put into Present Perfect Tense:
I must write the text again.
I have had to write the text again.
Put into Present Perfect Tense Negation:
I may run for the team.
I have not been allowed to run for the team.
Put into Present Perfect Tense:
She can write scary stories.
She has been able to write scary stories.
Put into Present Perfect Tense:
He may go on holiday alone.
He has been allowed to go on holiday alone.
Put into Present Perfect Tense:
She must wash her clothes.
She has had to wash her clothes.
Put into Past Tense Negation:
She must copy the text.
She didn´t have to copy the text.