could tuck
Regular verb: tuck - tucked- tucked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tuck
you could tuck
she could tuck
we could tuck
you could tuck
they could tuck 	I could be tucking
you could be tucking
she could be tucking
we could be tucking
you could be tucking
they could be tucking	I could have tucked
you could have tucked
she could have tucked
we could have tucked
you could have tucked
they could have tucked	I could have been tucking
you could have been tucking
she could have been tucking
we could have been tucking
you could have been tucking
they could have been tucking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tuck
you couldn't tuck
she couldn't tuck
we couldn't tuck
you couldn't tuck
they couldn't tuck 	I couldn't be tucking
you couldn't be tucking
she couldn't be tucking
we couldn't be tucking
you couldn't be tucking
they couldn't be tucking	I couldn't have tucked
you couldn't have tucked
she couldn't have tucked
we couldn't have tucked
you couldn't have tucked
they couldn't have tucked	I couldn't have been tucking
you couldn't have been tucking
she couldn't have been tucking
we couldn't have been tucking
you couldn't have been tucking
they couldn't have been tucking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tuck?
could you tuck?
could she tuck?
could we tuck?
could you tuck?
could they tuck? 	could I be tucking?
could you be tucking?
could she be tucking?
could we be tucking?
could you be tucking?
could they be tucking? 	could I have tucked?
could you have tucked?
could she have tucked?
could we have tucked?
could you have tucked?
could they have tucked? 	could I have been tucking?
could you have been tucking?
could she have been tucking?
could we have been tucking?
could you have been tucking?
could they have been tucking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tuck?
couldn't you tuck?
couldn't she tuck?
couldn't we tuck?
couldn't you tuck?
couldn't they tuck? 	couldn't I be tucking?
couldn't you be tucking?
couldn't she be tucking?
couldn't we be tucking?
couldn't you be tucking?
couldn't they be tucking? 	couldn't I have tucked?
couldn't you have tucked?
couldn't she have tucked?
couldn't we have tucked?
couldn't you have tucked?
couldn't they have tucked? 	couldn't I have been tucking?
couldn't you have been tucking?
couldn't she have been tucking?
couldn't we have been tucking?
couldn't you have been tucking?
couldn't they have been tucking?