English verb conjugation
CAN PORTEND

Regular verb: portend - portended - portended

Affirmation

Simple form	V-ing form
I can portend you can portend he can portend we can portend you can portend they can portend	I can be portending you can be portending he can be portending we can be portending you can be portending they can be portending
Perfect	V-ing perfect
I can have portended you can have portended he can have portended we can have portended you can have portended they can have portended	I can have been portending you can have been portending he can have been portending we can have been portending you can have been portending they can have been portending

Negation

Simple form	V-ing form
I cannot portend you cannot portend he cannot portend we cannot portend you cannot portend they cannot portend	I cannot be portending you cannot be portending he cannot be portending we cannot be portending you cannot be portending they cannot be portending
Perfect	V-ing perfect
I cannot have portended you cannot have portended he cannot have portended we cannot have portended you cannot have portended they cannot have portended	I cannot have been portending you cannot have been portending he cannot have been portending we cannot have been portending you cannot have been portending they cannot have been portending

Interrogative form

Simple form	V-ing form
can I portend? can you portend? can he portend? can we portend? can you portend? can they portend?	can I be portending? can you be portending? can he be portending? can we be portending? can you be portending? can they be portending?
Perfect	V-ing perfect
can I have portended? can you have portended? can he have portended? can we have portended? can you have portended? can they have portended?	can I have been portending? can you have been portending? can he have been portending? can we have been portending? can you have been portending? can they have been portending?

Interro-negative form

Simple form	V-ing form
can I not portend? can you not portend? can he not portend? can we not portend? can you not portend? can they not portend?	can I not be portending? can you not be portending? can he not be portending? can we not be portending? can you not be portending? can they not be portending?
Perfect	V-ing perfect
can I not have portended? can you not have portended? can he not have portended? can we not have portended? can you not have portended? can they not have portended?	can I not have been portending? can you not have been portending? can he not have been portending? can we not have been portending? can you not have been portending? can they not have been portending?