could tingle
Regular verb: tingle - tingled- tingled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?