English verb conjugation
COULD READ

Irregular verb: read - read - read

Affirmation

Simple form	V-ing form
I could read you could read she could read we could read you could read they could read	I could be reading you could be reading she could be reading we could be reading you could be reading they could be reading
Perfect	V-ing perfect
I could have read you could have read she could have read we could have read you could have read they could have read	I could have been reading you could have been reading she could have been reading we could have been reading you could have been reading they could have been reading

Negation

Simple form	V-ing form
I could not read you could not read she could not read we could not read you could not read they could not read	I could not be reading you could not be reading she could not be reading we could not be reading you could not be reading they could not be reading
Perfect	V-ing perfect
I could not have read you could not have read she could not have read we could not have read you could not have read they could not have read	I could not have been reading you could not have been reading she could not have been reading we could not have been reading you could not have been reading they could not have been reading

Interrogative form

Simple form	V-ing form
could I read? could you read? could she read? could we read? could you read? could they read?	could I be reading? could you be reading? could she be reading? could we be reading? could you be reading? could they be reading?
Perfect	V-ing perfect
could I have read? could you have read? could she have read? could we have read? could you have read? could they have read?	could I have been reading? could you have been reading? could she have been reading? could we have been reading? could you have been reading? could they have been reading?

Interro-negative form

Simple form	V-ing form
could I not read? could you not read? could she not read? could we not read? could you not read? could they not read?	could I not be reading? could you not be reading? could she not be reading? could we not be reading? could you not be reading? could they not be reading?
Perfect	V-ing perfect
could I not have read? could you not have read? could she not have read? could we not have read? could you not have read? could they not have read?	could I not have been reading? could you not have been reading? could she not have been reading? could we not have been reading? could you not have been reading? could they not have been reading?