could shatter
Regular verb: shatter - shattered- shattered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shatter
you could shatter
he could shatter
we could shatter
you could shatter
they could shatter 	I could be shattering
you could be shattering
he could be shattering
we could be shattering
you could be shattering
they could be shattering	I could have shattered
you could have shattered
he could have shattered
we could have shattered
you could have shattered
they could have shattered	I could have been shattering
you could have been shattering
he could have been shattering
we could have been shattering
you could have been shattering
they could have been shattering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't shatter
you couldn't shatter
he couldn't shatter
we couldn't shatter
you couldn't shatter
they couldn't shatter 	I couldn't be shattering
you couldn't be shattering
he couldn't be shattering
we couldn't be shattering
you couldn't be shattering
they couldn't be shattering	I couldn't have shattered
you couldn't have shattered
he couldn't have shattered
we couldn't have shattered
you couldn't have shattered
they couldn't have shattered	I couldn't have been shattering
you couldn't have been shattering
he couldn't have been shattering
we couldn't have been shattering
you couldn't have been shattering
they couldn't have been shattering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shatter?
could you shatter?
could he shatter?
could we shatter?
could you shatter?
could they shatter? 	could I be shattering?
could you be shattering?
could he be shattering?
could we be shattering?
could you be shattering?
could they be shattering? 	could I have shattered?
could you have shattered?
could he have shattered?
could we have shattered?
could you have shattered?
could they have shattered? 	could I have been shattering?
could you have been shattering?
could he have been shattering?
could we have been shattering?
could you have been shattering?
could they have been shattering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I shatter?
couldn't you shatter?
couldn't he shatter?
couldn't we shatter?
couldn't you shatter?
couldn't they shatter? 	couldn't I be shattering?
couldn't you be shattering?
couldn't he be shattering?
couldn't we be shattering?
couldn't you be shattering?
couldn't they be shattering? 	couldn't I have shattered?
couldn't you have shattered?
couldn't he have shattered?
couldn't we have shattered?
couldn't you have shattered?
couldn't they have shattered? 	couldn't I have been shattering?
couldn't you have been shattering?
couldn't he have been shattering?
couldn't we have been shattering?
couldn't you have been shattering?
couldn't they have been shattering?