English verb conjugation
CAN UPTURN

Regular verb: upturn - upturned - upturned

Affirmation

Simple form	V-ing form
I can upturn you can upturn he can upturn we can upturn you can upturn they can upturn	I can be upturning you can be upturning he can be upturning we can be upturning you can be upturning they can be upturning
Perfect	V-ing perfect
I can have upturned you can have upturned he can have upturned we can have upturned you can have upturned they can have upturned	I can have been upturning you can have been upturning he can have been upturning we can have been upturning you can have been upturning they can have been upturning

Negation

Simple form	V-ing form
I cannot upturn you cannot upturn he cannot upturn we cannot upturn you cannot upturn they cannot upturn	I cannot be upturning you cannot be upturning he cannot be upturning we cannot be upturning you cannot be upturning they cannot be upturning
Perfect	V-ing perfect
I cannot have upturned you cannot have upturned he cannot have upturned we cannot have upturned you cannot have upturned they cannot have upturned	I cannot have been upturning you cannot have been upturning he cannot have been upturning we cannot have been upturning you cannot have been upturning they cannot have been upturning

Interrogative form

Simple form	V-ing form
can I upturn? can you upturn? can he upturn? can we upturn? can you upturn? can they upturn?	can I be upturning? can you be upturning? can he be upturning? can we be upturning? can you be upturning? can they be upturning?
Perfect	V-ing perfect
can I have upturned? can you have upturned? can he have upturned? can we have upturned? can you have upturned? can they have upturned?	can I have been upturning? can you have been upturning? can he have been upturning? can we have been upturning? can you have been upturning? can they have been upturning?

Interro-negative form

Simple form	V-ing form
can I not upturn? can you not upturn? can he not upturn? can we not upturn? can you not upturn? can they not upturn?	can I not be upturning? can you not be upturning? can he not be upturning? can we not be upturning? can you not be upturning? can they not be upturning?
Perfect	V-ing perfect
can I not have upturned? can you not have upturned? can he not have upturned? can we not have upturned? can you not have upturned? can they not have upturned?	can I not have been upturning? can you not have been upturning? can he not have been upturning? can we not have been upturning? can you not have been upturning? can they not have been upturning?