could tinge
Regular verb: tinge - tinged- tinged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tinge
you could tinge
he could tinge
we could tinge
you could tinge
they could tinge 	I could be tinging
you could be tinging
he could be tinging
we could be tinging
you could be tinging
they could be tinging	I could have tinged
you could have tinged
he could have tinged
we could have tinged
you could have tinged
they could have tinged	I could have been tinging
you could have been tinging
he could have been tinging
we could have been tinging
you could have been tinging
they could have been tinging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tinge
you couldn't tinge
he couldn't tinge
we couldn't tinge
you couldn't tinge
they couldn't tinge 	I couldn't be tinging
you couldn't be tinging
he couldn't be tinging
we couldn't be tinging
you couldn't be tinging
they couldn't be tinging	I couldn't have tinged
you couldn't have tinged
he couldn't have tinged
we couldn't have tinged
you couldn't have tinged
they couldn't have tinged	I couldn't have been tinging
you couldn't have been tinging
he couldn't have been tinging
we couldn't have been tinging
you couldn't have been tinging
they couldn't have been tinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tinge?
could you tinge?
could he tinge?
could we tinge?
could you tinge?
could they tinge? 	could I be tinging?
could you be tinging?
could he be tinging?
could we be tinging?
could you be tinging?
could they be tinging? 	could I have tinged?
could you have tinged?
could he have tinged?
could we have tinged?
could you have tinged?
could they have tinged? 	could I have been tinging?
could you have been tinging?
could he have been tinging?
could we have been tinging?
could you have been tinging?
could they have been tinging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tinge?
couldn't you tinge?
couldn't he tinge?
couldn't we tinge?
couldn't you tinge?
couldn't they tinge? 	couldn't I be tinging?
couldn't you be tinging?
couldn't he be tinging?
couldn't we be tinging?
couldn't you be tinging?
couldn't they be tinging? 	couldn't I have tinged?
couldn't you have tinged?
couldn't he have tinged?
couldn't we have tinged?
couldn't you have tinged?
couldn't they have tinged? 	couldn't I have been tinging?
couldn't you have been tinging?
couldn't he have been tinging?
couldn't we have been tinging?
couldn't you have been tinging?
couldn't they have been tinging?