can scumble
Regular verb: scumble - scumbled- scumbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can scumble
you can scumble
he can scumble
we can scumble
you can scumble
they can scumble 	I can be scumbling
you can be scumbling
he can be scumbling
we can be scumbling
you can be scumbling
they can be scumbling	I can have scumbled
you can have scumbled
he can have scumbled
we can have scumbled
you can have scumbled
they can have scumbled	I can have been scumbling
you can have been scumbling
he can have been scumbling
we can have been scumbling
you can have been scumbling
they can have been scumbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't scumble
you can't scumble
he can't scumble
we can't scumble
you can't scumble
they can't scumble 	I can't be scumbling
you can't be scumbling
he can't be scumbling
we can't be scumbling
you can't be scumbling
they can't be scumbling	I can't have scumbled
you can't have scumbled
he can't have scumbled
we can't have scumbled
you can't have scumbled
they can't have scumbled	I can't have been scumbling
you can't have been scumbling
he can't have been scumbling
we can't have been scumbling
you can't have been scumbling
they can't have been scumbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I scumble?
can you scumble?
can he scumble?
can we scumble?
can you scumble?
can they scumble? 	can I be scumbling?
can you be scumbling?
can he be scumbling?
can we be scumbling?
can you be scumbling?
can they be scumbling? 	can I have scumbled?
can you have scumbled?
can he have scumbled?
can we have scumbled?
can you have scumbled?
can they have scumbled? 	can I have been scumbling?
can you have been scumbling?
can he have been scumbling?
can we have been scumbling?
can you have been scumbling?
can they have been scumbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I scumble?
can't you scumble?
can't he scumble?
can't we scumble?
can't you scumble?
can't they scumble? 	can't I be scumbling?
can't you be scumbling?
can't he be scumbling?
can't we be scumbling?
can't you be scumbling?
can't they be scumbling? 	can't I have scumbled?
can't you have scumbled?
can't he have scumbled?
can't we have scumbled?
can't you have scumbled?
can't they have scumbled? 	can't I have been scumbling?
can't you have been scumbling?
can't he have been scumbling?
can't we have been scumbling?
can't you have been scumbling?
can't they have been scumbling?