English verb conjugation
CAN UPEND

Regular verb: upend - upended - upended

Affirmation

Simple form	V-ing form
I can upend you can upend he can upend we can upend you can upend they can upend	I can be upending you can be upending he can be upending we can be upending you can be upending they can be upending
Perfect	V-ing perfect
I can have upended you can have upended he can have upended we can have upended you can have upended they can have upended	I can have been upending you can have been upending he can have been upending we can have been upending you can have been upending they can have been upending

Negation

Simple form	V-ing form
I cannot upend you cannot upend he cannot upend we cannot upend you cannot upend they cannot upend	I cannot be upending you cannot be upending he cannot be upending we cannot be upending you cannot be upending they cannot be upending
Perfect	V-ing perfect
I cannot have upended you cannot have upended he cannot have upended we cannot have upended you cannot have upended they cannot have upended	I cannot have been upending you cannot have been upending he cannot have been upending we cannot have been upending you cannot have been upending they cannot have been upending

Interrogative form

Simple form	V-ing form
can I upend? can you upend? can he upend? can we upend? can you upend? can they upend?	can I be upending? can you be upending? can he be upending? can we be upending? can you be upending? can they be upending?
Perfect	V-ing perfect
can I have upended? can you have upended? can he have upended? can we have upended? can you have upended? can they have upended?	can I have been upending? can you have been upending? can he have been upending? can we have been upending? can you have been upending? can they have been upending?

Interro-negative form

Simple form	V-ing form
can I not upend? can you not upend? can he not upend? can we not upend? can you not upend? can they not upend?	can I not be upending? can you not be upending? can he not be upending? can we not be upending? can you not be upending? can they not be upending?
Perfect	V-ing perfect
can I not have upended? can you not have upended? can he not have upended? can we not have upended? can you not have upended? can they not have upended?	can I not have been upending? can you not have been upending? can he not have been upending? can we not have been upending? can you not have been upending? can they not have been upending?