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 cannot function
you cannot function
he cannot function
we cannot function
you cannot function
they cannot function

V-ing form

I cannot be functioning
you cannot be functioning
he cannot be functioning
we cannot be functioning
you cannot be functioning
they cannot be functioning

Perfect

I cannot have functioned
you cannot have functioned
he cannot have functioned
we cannot have functioned
you cannot have functioned
they cannot have functioned

V-ing perfect

I cannot have been functioning
you cannot have been functioning
he cannot have been functioning
we cannot have been functioning
you cannot have been functioning
they cannot 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 I not function?
can you not function?
can he not function?
can we not function?
can you not function?
can they not function?

V-ing form

can I not be functioning?
can you not be functioning?
can he not be functioning?
can we not be functioning?
can you not be functioning?
can they not be functioning?

Perfect

can I not have functioned?
can you not have functioned?
can he not have functioned?
can we not have functioned?
can you not have functioned?
can they not have functioned?

V-ing perfect

can I not have been functioning?
can you not have been functioning?
can he not have been functioning?
can we not have been functioning?
can you not have been functioning?
can they not have been functioning?

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