English verb conjugation
COULD ERODE

Regular verb: erode - eroded - eroded

Affirmation

Simple form	V-ing form
I could erode you could erode he could erode we could erode you could erode they could erode	I could be eroding you could be eroding he could be eroding we could be eroding you could be eroding they could be eroding
Perfect	V-ing perfect
I could have eroded you could have eroded he could have eroded we could have eroded you could have eroded they could have eroded	I could have been eroding you could have been eroding he could have been eroding we could have been eroding you could have been eroding they could have been eroding

Negation

Simple form	V-ing form
I couldn't erode you couldn't erode he couldn't erode we couldn't erode you couldn't erode they couldn't erode	I couldn't be eroding you couldn't be eroding he couldn't be eroding we couldn't be eroding you couldn't be eroding they couldn't be eroding
Perfect	V-ing perfect
I couldn't have eroded you couldn't have eroded he couldn't have eroded we couldn't have eroded you couldn't have eroded they couldn't have eroded	I couldn't have been eroding you couldn't have been eroding he couldn't have been eroding we couldn't have been eroding you couldn't have been eroding they couldn't have been eroding

Interrogative form

Simple form	V-ing form
could I erode? could you erode? could he erode? could we erode? could you erode? could they erode?	could I be eroding? could you be eroding? could he be eroding? could we be eroding? could you be eroding? could they be eroding?
Perfect	V-ing perfect
could I have eroded? could you have eroded? could he have eroded? could we have eroded? could you have eroded? could they have eroded?	could I have been eroding? could you have been eroding? could he have been eroding? could we have been eroding? could you have been eroding? could they have been eroding?

Interro-negative form

Simple form	V-ing form
couldn't I erode? couldn't you erode? couldn't he erode? couldn't we erode? couldn't you erode? couldn't they erode?	couldn't I be eroding? couldn't you be eroding? couldn't he be eroding? couldn't we be eroding? couldn't you be eroding? couldn't they be eroding?
Perfect	V-ing perfect
couldn't I have eroded? couldn't you have eroded? couldn't he have eroded? couldn't we have eroded? couldn't you have eroded? couldn't they have eroded?	couldn't I have been eroding? couldn't you have been eroding? couldn't he have been eroding? couldn't we have been eroding? couldn't you have been eroding? couldn't they have been eroding?