English verb conjugation
COULD ERASE

Regular verb: erase - erased - erased

Affirmation

Simple form	V-ing form
I could erase you could erase he could erase we could erase you could erase they could erase	I could be erasing you could be erasing he could be erasing we could be erasing you could be erasing they could be erasing
Perfect	V-ing perfect
I could have erased you could have erased he could have erased we could have erased you could have erased they could have erased	I could have been erasing you could have been erasing he could have been erasing we could have been erasing you could have been erasing they could have been erasing

Negation

Simple form	V-ing form
I couldn't erase you couldn't erase he couldn't erase we couldn't erase you couldn't erase they couldn't erase	I couldn't be erasing you couldn't be erasing he couldn't be erasing we couldn't be erasing you couldn't be erasing they couldn't be erasing
Perfect	V-ing perfect
I couldn't have erased you couldn't have erased he couldn't have erased we couldn't have erased you couldn't have erased they couldn't have erased	I couldn't have been erasing you couldn't have been erasing he couldn't have been erasing we couldn't have been erasing you couldn't have been erasing they couldn't have been erasing

Interrogative form

Simple form	V-ing form
could I erase? could you erase? could he erase? could we erase? could you erase? could they erase?	could I be erasing? could you be erasing? could he be erasing? could we be erasing? could you be erasing? could they be erasing?
Perfect	V-ing perfect
could I have erased? could you have erased? could he have erased? could we have erased? could you have erased? could they have erased?	could I have been erasing? could you have been erasing? could he have been erasing? could we have been erasing? could you have been erasing? could they have been erasing?

Interro-negative form

Simple form	V-ing form
couldn't I erase? couldn't you erase? couldn't he erase? couldn't we erase? couldn't you erase? couldn't they erase?	couldn't I be erasing? couldn't you be erasing? couldn't he be erasing? couldn't we be erasing? couldn't you be erasing? couldn't they be erasing?
Perfect	V-ing perfect
couldn't I have erased? couldn't you have erased? couldn't he have erased? couldn't we have erased? couldn't you have erased? couldn't they have erased?	couldn't I have been erasing? couldn't you have been erasing? couldn't he have been erasing? couldn't we have been erasing? couldn't you have been erasing? couldn't they have been erasing?