English verb conjugation
COULD OVERLAP

Regular verb: overlap - overlapped - overlapped

Affirmation

Simple form	V-ing form
I could overlap you could overlap she could overlap we could overlap you could overlap they could overlap	I could be overlapping you could be overlapping she could be overlapping we could be overlapping you could be overlapping they could be overlapping
Perfect	V-ing perfect
I could have overlapped you could have overlapped she could have overlapped we could have overlapped you could have overlapped they could have overlapped	I could have been overlapping you could have been overlapping she could have been overlapping we could have been overlapping you could have been overlapping they could have been overlapping

Negation

Simple form	V-ing form
I couldn't overlap you couldn't overlap she couldn't overlap we couldn't overlap you couldn't overlap they couldn't overlap	I couldn't be overlapping you couldn't be overlapping she couldn't be overlapping we couldn't be overlapping you couldn't be overlapping they couldn't be overlapping
Perfect	V-ing perfect
I couldn't have overlapped you couldn't have overlapped she couldn't have overlapped we couldn't have overlapped you couldn't have overlapped they couldn't have overlapped	I couldn't have been overlapping you couldn't have been overlapping she couldn't have been overlapping we couldn't have been overlapping you couldn't have been overlapping they couldn't have been overlapping

Interrogative form

Simple form	V-ing form
could I overlap? could you overlap? could she overlap? could we overlap? could you overlap? could they overlap?	could I be overlapping? could you be overlapping? could she be overlapping? could we be overlapping? could you be overlapping? could they be overlapping?
Perfect	V-ing perfect
could I have overlapped? could you have overlapped? could she have overlapped? could we have overlapped? could you have overlapped? could they have overlapped?	could I have been overlapping? could you have been overlapping? could she have been overlapping? could we have been overlapping? could you have been overlapping? could they have been overlapping?

Interro-negative form

Simple form	V-ing form
couldn't I overlap? couldn't you overlap? couldn't she overlap? couldn't we overlap? couldn't you overlap? couldn't they overlap?	couldn't I be overlapping? couldn't you be overlapping? couldn't she be overlapping? couldn't we be overlapping? couldn't you be overlapping? couldn't they be overlapping?
Perfect	V-ing perfect
couldn't I have overlapped? couldn't you have overlapped? couldn't she have overlapped? couldn't we have overlapped? couldn't you have overlapped? couldn't they have overlapped?	couldn't I have been overlapping? couldn't you have been overlapping? couldn't she have been overlapping? couldn't we have been overlapping? couldn't you have been overlapping? couldn't they have been overlapping?