English verb conjugation CAN FUNCTION

Regular verb: function - functioned - functioned

Affirmation

Simple form

I can function
you can function
he can function
we can function
you can function
they can function

V-ing form

I can be functioning
you can be functioning
he can be functioning
we can be functioning
you can be functioning
they can be functioning

Perfect

I can have functioned
you can have functioned
he can have functioned
we can have functioned
you can have functioned
they can have functioned

V-ing perfect

I can have been functioning
you can have been functioning
he can have been functioning
we can have been functioning
you can have been functioning
they can have been functioning

Negation

Simple form

I can't function
you can't function
he can't function
we can't function
you can't function
they can't function

V-ing form

I can't be functioning
you can't be functioning
he can't be functioning
we can't be functioning
you can't be functioning
they can't be functioning

Perfect

I can't have functioned
you can't have functioned
he can't have functioned
we can't have functioned
you can't have functioned
they can't have functioned

V-ing perfect

I can't have been functioning
you can't have been functioning
he can't have been functioning
we can't have been functioning
you can't have been functioning
they can't have been functioning

Interrogative form

Simple form

can I function?
can you function?
can he function?
can we function?
can you function?
can they function?

V-ing form

can I be functioning?
can you be functioning?
can he be functioning?
can we be functioning?
can you be functioning?
can they be functioning?

Perfect

can I have functioned?
can you have functioned?
can he have functioned?
can we have functioned?
can you have functioned?
can they have functioned?

V-ing perfect

can I have been functioning?
can you have been functioning?
can he have been functioning?
can we have been functioning?
can you have been functioning?
can they have been functioning?

Interro-negative form

Simple form

can't I function?
can't you function?
can't he function?
can't we function?
can't you function?
can't they function?

V-ing form

can't I be functioning?
can't you be functioning?
can't he be functioning?
can't we be functioning?
can't you be functioning?
can't they be functioning?

Perfect

can't I have functioned?
can't you have functioned?
can't he have functioned?
can't we have functioned?
can't you have functioned?
can't they have functioned?

V-ing perfect

can't I have been functioning?
can't you have been functioning?
can't he have been functioning?
can't we have been functioning?
can't you have been functioning?
can't they have been functioning?

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