could starch
Regular verb: starch - starched- starched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could starch
you could starch
he could starch
we could starch
you could starch
they could starch 	I could be starching
you could be starching
he could be starching
we could be starching
you could be starching
they could be starching	I could have starched
you could have starched
he could have starched
we could have starched
you could have starched
they could have starched	I could have been starching
you could have been starching
he could have been starching
we could have been starching
you could have been starching
they could have been starching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not starch
you could not starch
he could not starch
we could not starch
you could not starch
they could not starch 	I could not be starching
you could not be starching
he could not be starching
we could not be starching
you could not be starching
they could not be starching	I could not have starched
you could not have starched
he could not have starched
we could not have starched
you could not have starched
they could not have starched	I could not have been starching
you could not have been starching
he could not have been starching
we could not have been starching
you could not have been starching
they could not have been starching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I starch?
could you starch?
could he starch?
could we starch?
could you starch?
could they starch? 	could I be starching?
could you be starching?
could he be starching?
could we be starching?
could you be starching?
could they be starching? 	could I have starched?
could you have starched?
could he have starched?
could we have starched?
could you have starched?
could they have starched? 	could I have been starching?
could you have been starching?
could he have been starching?
could we have been starching?
could you have been starching?
could they have been starching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not starch?
could you not starch?
could he not starch?
could we not starch?
could you not starch?
could they not starch? 	could I not be starching?
could you not be starching?
could he not be starching?
could we not be starching?
could you not be starching?
could they not be starching? 	could I not have starched?
could you not have starched?
could he not have starched?
could we not have starched?
could you not have starched?
could they not have starched? 	could I not have been starching?
could you not have been starching?
could he not have been starching?
could we not have been starching?
could you not have been starching?
could they not have been starching?