could thatch
Regular verb: thatch - thatched- thatched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could thatch
you could thatch
she could thatch
we could thatch
you could thatch
they could thatch 	I could be thatching
you could be thatching
she could be thatching
we could be thatching
you could be thatching
they could be thatching	I could have thatched
you could have thatched
she could have thatched
we could have thatched
you could have thatched
they could have thatched	I could have been thatching
you could have been thatching
she could have been thatching
we could have been thatching
you could have been thatching
they could have been thatching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't thatch
you couldn't thatch
she couldn't thatch
we couldn't thatch
you couldn't thatch
they couldn't thatch 	I couldn't be thatching
you couldn't be thatching
she couldn't be thatching
we couldn't be thatching
you couldn't be thatching
they couldn't be thatching	I couldn't have thatched
you couldn't have thatched
she couldn't have thatched
we couldn't have thatched
you couldn't have thatched
they couldn't have thatched	I couldn't have been thatching
you couldn't have been thatching
she couldn't have been thatching
we couldn't have been thatching
you couldn't have been thatching
they couldn't have been thatching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I thatch?
could you thatch?
could she thatch?
could we thatch?
could you thatch?
could they thatch? 	could I be thatching?
could you be thatching?
could she be thatching?
could we be thatching?
could you be thatching?
could they be thatching? 	could I have thatched?
could you have thatched?
could she have thatched?
could we have thatched?
could you have thatched?
could they have thatched? 	could I have been thatching?
could you have been thatching?
could she have been thatching?
could we have been thatching?
could you have been thatching?
could they have been thatching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I thatch?
couldn't you thatch?
couldn't she thatch?
couldn't we thatch?
couldn't you thatch?
couldn't they thatch? 	couldn't I be thatching?
couldn't you be thatching?
couldn't she be thatching?
couldn't we be thatching?
couldn't you be thatching?
couldn't they be thatching? 	couldn't I have thatched?
couldn't you have thatched?
couldn't she have thatched?
couldn't we have thatched?
couldn't you have thatched?
couldn't they have thatched? 	couldn't I have been thatching?
couldn't you have been thatching?
couldn't she have been thatching?
couldn't we have been thatching?
couldn't you have been thatching?
couldn't they have been thatching?