English verb conjugation
COULD TINGLE

Regular verb: tingle - tingled - tingled

Affirmation

Simple form	V-ing form
I could tingle you could tingle he could tingle we could tingle you could tingle they could tingle	I could be tingling you could be tingling he could be tingling we could be tingling you could be tingling they could be tingling
Perfect	V-ing perfect
I could have tingled you could have tingled he could have tingled we could have tingled you could have tingled they could have tingled	I could have been tingling you could have been tingling he could have been tingling we could have been tingling you could have been tingling they could have been tingling

Negation

Simple form	V-ing form
I couldn't tingle you couldn't tingle he couldn't tingle we couldn't tingle you couldn't tingle they couldn't tingle	I couldn't be tingling you couldn't be tingling he couldn't be tingling we couldn't be tingling you couldn't be tingling they couldn't be tingling
Perfect	V-ing perfect
I couldn't have tingled you couldn't have tingled he couldn't have tingled we couldn't have tingled you couldn't have tingled they couldn't have tingled	I couldn't have been tingling you couldn't have been tingling he couldn't have been tingling we couldn't have been tingling you couldn't have been tingling they couldn't have been tingling

Interrogative form

Simple form	V-ing form
could I tingle? could you tingle? could he tingle? could we tingle? could you tingle? could they tingle?	could I be tingling? could you be tingling? could he be tingling? could we be tingling? could you be tingling? could they be tingling?
Perfect	V-ing perfect
could I have tingled? could you have tingled? could he have tingled? could we have tingled? could you have tingled? could they have tingled?	could I have been tingling? could you have been tingling? could he have been tingling? could we have been tingling? could you have been tingling? could they have been tingling?

Interro-negative form

Simple form	V-ing form
couldn't I tingle? couldn't you tingle? couldn't he tingle? couldn't we tingle? couldn't you tingle? couldn't they tingle?	couldn't I be tingling? couldn't you be tingling? couldn't he be tingling? couldn't we be tingling? couldn't you be tingling? couldn't they be tingling?
Perfect	V-ing perfect
couldn't I have tingled? couldn't you have tingled? couldn't he have tingled? couldn't we have tingled? couldn't you have tingled? couldn't they have tingled?	couldn't I have been tingling? couldn't you have been tingling? couldn't he have been tingling? couldn't we have been tingling? couldn't you have been tingling? couldn't they have been tingling?