English verb conjugation
COULD RADIOPHONE

Regular verb: radiophone - radiophoned - radiophoned

Affirmation

Simple form	V-ing form
I could radiophone you could radiophone he could radiophone we could radiophone you could radiophone they could radiophone	I could be radiophoning you could be radiophoning he could be radiophoning we could be radiophoning you could be radiophoning they could be radiophoning
Perfect	V-ing perfect
I could have radiophoned you could have radiophoned he could have radiophoned we could have radiophoned you could have radiophoned they could have radiophoned	I could have been radiophoning you could have been radiophoning he could have been radiophoning we could have been radiophoning you could have been radiophoning they could have been radiophoning

Negation

Simple form	V-ing form
I couldn't radiophone you couldn't radiophone he couldn't radiophone we couldn't radiophone you couldn't radiophone they couldn't radiophone	I couldn't be radiophoning you couldn't be radiophoning he couldn't be radiophoning we couldn't be radiophoning you couldn't be radiophoning they couldn't be radiophoning
Perfect	V-ing perfect
I couldn't have radiophoned you couldn't have radiophoned he couldn't have radiophoned we couldn't have radiophoned you couldn't have radiophoned they couldn't have radiophoned	I couldn't have been radiophoning you couldn't have been radiophoning he couldn't have been radiophoning we couldn't have been radiophoning you couldn't have been radiophoning they couldn't have been radiophoning

Interrogative form

Simple form	V-ing form
could I radiophone? could you radiophone? could he radiophone? could we radiophone? could you radiophone? could they radiophone?	could I be radiophoning? could you be radiophoning? could he be radiophoning? could we be radiophoning? could you be radiophoning? could they be radiophoning?
Perfect	V-ing perfect
could I have radiophoned? could you have radiophoned? could he have radiophoned? could we have radiophoned? could you have radiophoned? could they have radiophoned?	could I have been radiophoning? could you have been radiophoning? could he have been radiophoning? could we have been radiophoning? could you have been radiophoning? could they have been radiophoning?

Interro-negative form

Simple form	V-ing form
couldn't I radiophone? couldn't you radiophone? couldn't he radiophone? couldn't we radiophone? couldn't you radiophone? couldn't they radiophone?	couldn't I be radiophoning? couldn't you be radiophoning? couldn't he be radiophoning? couldn't we be radiophoning? couldn't you be radiophoning? couldn't they be radiophoning?
Perfect	V-ing perfect
couldn't I have radiophoned? couldn't you have radiophoned? couldn't he have radiophoned? couldn't we have radiophoned? couldn't you have radiophoned? couldn't they have radiophoned?	couldn't I have been radiophoning? couldn't you have been radiophoning? couldn't he have been radiophoning? couldn't we have been radiophoning? couldn't you have been radiophoning? couldn't they have been radiophoning?