English verb conjugation
COULD SHINGLE

Regular verb: shingle - shingled - shingled

Affirmation

Simple form	V-ing form
I could shingle you could shingle he could shingle we could shingle you could shingle they could shingle	I could be shingling you could be shingling he could be shingling we could be shingling you could be shingling they could be shingling
Perfect	V-ing perfect
I could have shingled you could have shingled he could have shingled we could have shingled you could have shingled they could have shingled	I could have been shingling you could have been shingling he could have been shingling we could have been shingling you could have been shingling they could have been shingling

Negation

Simple form	V-ing form
I could not shingle you could not shingle he could not shingle we could not shingle you could not shingle they could not shingle	I could not be shingling you could not be shingling he could not be shingling we could not be shingling you could not be shingling they could not be shingling
Perfect	V-ing perfect
I could not have shingled you could not have shingled he could not have shingled we could not have shingled you could not have shingled they could not have shingled	I could not have been shingling you could not have been shingling he could not have been shingling we could not have been shingling you could not have been shingling they could not have been shingling

Interrogative form

Simple form	V-ing form
could I shingle? could you shingle? could he shingle? could we shingle? could you shingle? could they shingle?	could I be shingling? could you be shingling? could he be shingling? could we be shingling? could you be shingling? could they be shingling?
Perfect	V-ing perfect
could I have shingled? could you have shingled? could he have shingled? could we have shingled? could you have shingled? could they have shingled?	could I have been shingling? could you have been shingling? could he have been shingling? could we have been shingling? could you have been shingling? could they have been shingling?

Interro-negative form

Simple form	V-ing form
could I not shingle? could you not shingle? could he not shingle? could we not shingle? could you not shingle? could they not shingle?	could I not be shingling? could you not be shingling? could he not be shingling? could we not be shingling? could you not be shingling? could they not be shingling?
Perfect	V-ing perfect
could I not have shingled? could you not have shingled? could he not have shingled? could we not have shingled? could you not have shingled? could they not have shingled?	could I not have been shingling? could you not have been shingling? could he not have been shingling? could we not have been shingling? could you not have been shingling? could they not have been shingling?