English verb conjugation
COULD PORTEND

Regular verb: portend - portended - portended

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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