English verb conjugation
COULD SHINGLE

Regular verb: shingle - shingled - shingled

Affirmation

Simple form	V-ing form
I could shingle you could shingle she could shingle we could shingle you could shingle they could shingle	I could be shingling you could be shingling she 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 she 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 she 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 couldn't shingle you couldn't shingle she couldn't shingle we couldn't shingle you couldn't shingle they couldn't shingle	I couldn't be shingling you couldn't be shingling she couldn't be shingling we couldn't be shingling you couldn't be shingling they couldn't be shingling
Perfect	V-ing perfect
I couldn't have shingled you couldn't have shingled she couldn't have shingled we couldn't have shingled you couldn't have shingled they couldn't have shingled	I couldn't have been shingling you couldn't have been shingling she couldn't have been shingling we couldn't have been shingling you couldn't have been shingling they couldn't have been shingling

Interrogative form

Simple form	V-ing form
could I shingle? could you shingle? could she shingle? could we shingle? could you shingle? could they shingle?	could I be shingling? could you be shingling? could she 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 she 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 she 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
couldn't I shingle? couldn't you shingle? couldn't she shingle? couldn't we shingle? couldn't you shingle? couldn't they shingle?	couldn't I be shingling? couldn't you be shingling? couldn't she be shingling? couldn't we be shingling? couldn't you be shingling? couldn't they be shingling?
Perfect	V-ing perfect
couldn't I have shingled? couldn't you have shingled? couldn't she have shingled? couldn't we have shingled? couldn't you have shingled? couldn't they have shingled?	couldn't I have been shingling? couldn't you have been shingling? couldn't she have been shingling? couldn't we have been shingling? couldn't you have been shingling? couldn't they have been shingling?