can crust
Regular verb: crust - crusted- crusted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can crust
you can crust
she can crust
we can crust
you can crust
they can crust 	I can be crusting
you can be crusting
she can be crusting
we can be crusting
you can be crusting
they can be crusting	I can have crusted
you can have crusted
she can have crusted
we can have crusted
you can have crusted
they can have crusted	I can have been crusting
you can have been crusting
she can have been crusting
we can have been crusting
you can have been crusting
they can have been crusting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't crust
you can't crust
she can't crust
we can't crust
you can't crust
they can't crust 	I can't be crusting
you can't be crusting
she can't be crusting
we can't be crusting
you can't be crusting
they can't be crusting	I can't have crusted
you can't have crusted
she can't have crusted
we can't have crusted
you can't have crusted
they can't have crusted	I can't have been crusting
you can't have been crusting
she can't have been crusting
we can't have been crusting
you can't have been crusting
they can't have been crusting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I crust?
can you crust?
can she crust?
can we crust?
can you crust?
can they crust? 	can I be crusting?
can you be crusting?
can she be crusting?
can we be crusting?
can you be crusting?
can they be crusting? 	can I have crusted?
can you have crusted?
can she have crusted?
can we have crusted?
can you have crusted?
can they have crusted? 	can I have been crusting?
can you have been crusting?
can she have been crusting?
can we have been crusting?
can you have been crusting?
can they have been crusting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I crust?
can't you crust?
can't she crust?
can't we crust?
can't you crust?
can't they crust? 	can't I be crusting?
can't you be crusting?
can't she be crusting?
can't we be crusting?
can't you be crusting?
can't they be crusting? 	can't I have crusted?
can't you have crusted?
can't she have crusted?
can't we have crusted?
can't you have crusted?
can't they have crusted? 	can't I have been crusting?
can't you have been crusting?
can't she have been crusting?
can't we have been crusting?
can't you have been crusting?
can't they have been crusting?