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 couldn't portend you couldn't portend he couldn't portend we couldn't portend you couldn't portend they couldn't portend	I couldn't be portending you couldn't be portending he couldn't be portending we couldn't be portending you couldn't be portending they couldn't be portending
Perfect	V-ing perfect
I couldn't have portended you couldn't have portended he couldn't have portended we couldn't have portended you couldn't have portended they couldn't have portended	I couldn't have been portending you couldn't have been portending he couldn't have been portending we couldn't have been portending you couldn't have been portending they couldn't 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
couldn't I portend? couldn't you portend? couldn't he portend? couldn't we portend? couldn't you portend? couldn't they portend?	couldn't I be portending? couldn't you be portending? couldn't he be portending? couldn't we be portending? couldn't you be portending? couldn't they be portending?
Perfect	V-ing perfect
couldn't I have portended? couldn't you have portended? couldn't he have portended? couldn't we have portended? couldn't you have portended? couldn't they have portended?	couldn't I have been portending? couldn't you have been portending? couldn't he have been portending? couldn't we have been portending? couldn't you have been portending? couldn't they have been portending?