can windmill
Regular verb: windmill - windmilled- windmilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can windmill
you can windmill
she can windmill
we can windmill
you can windmill
they can windmill 	I can be windmilling
you can be windmilling
she can be windmilling
we can be windmilling
you can be windmilling
they can be windmilling	I can have windmilled
you can have windmilled
she can have windmilled
we can have windmilled
you can have windmilled
they can have windmilled	I can have been windmilling
you can have been windmilling
she can have been windmilling
we can have been windmilling
you can have been windmilling
they can have been windmilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't windmill
you can't windmill
she can't windmill
we can't windmill
you can't windmill
they can't windmill 	I can't be windmilling
you can't be windmilling
she can't be windmilling
we can't be windmilling
you can't be windmilling
they can't be windmilling	I can't have windmilled
you can't have windmilled
she can't have windmilled
we can't have windmilled
you can't have windmilled
they can't have windmilled	I can't have been windmilling
you can't have been windmilling
she can't have been windmilling
we can't have been windmilling
you can't have been windmilling
they can't have been windmilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I windmill?
can you windmill?
can she windmill?
can we windmill?
can you windmill?
can they windmill? 	can I be windmilling?
can you be windmilling?
can she be windmilling?
can we be windmilling?
can you be windmilling?
can they be windmilling? 	can I have windmilled?
can you have windmilled?
can she have windmilled?
can we have windmilled?
can you have windmilled?
can they have windmilled? 	can I have been windmilling?
can you have been windmilling?
can she have been windmilling?
can we have been windmilling?
can you have been windmilling?
can they have been windmilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I windmill?
can't you windmill?
can't she windmill?
can't we windmill?
can't you windmill?
can't they windmill? 	can't I be windmilling?
can't you be windmilling?
can't she be windmilling?
can't we be windmilling?
can't you be windmilling?
can't they be windmilling? 	can't I have windmilled?
can't you have windmilled?
can't she have windmilled?
can't we have windmilled?
can't you have windmilled?
can't they have windmilled? 	can't I have been windmilling?
can't you have been windmilling?
can't she have been windmilling?
can't we have been windmilling?
can't you have been windmilling?
can't they have been windmilling?