can boil
Regular verb: boil - boiled- boiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can boil
you can boil
he can boil
we can boil
you can boil
they can boil 	I can be boiling
you can be boiling
he can be boiling
we can be boiling
you can be boiling
they can be boiling	I can have boiled
you can have boiled
he can have boiled
we can have boiled
you can have boiled
they can have boiled	I can have been boiling
you can have been boiling
he can have been boiling
we can have been boiling
you can have been boiling
they can have been boiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't boil
you can't boil
he can't boil
we can't boil
you can't boil
they can't boil 	I can't be boiling
you can't be boiling
he can't be boiling
we can't be boiling
you can't be boiling
they can't be boiling	I can't have boiled
you can't have boiled
he can't have boiled
we can't have boiled
you can't have boiled
they can't have boiled	I can't have been boiling
you can't have been boiling
he can't have been boiling
we can't have been boiling
you can't have been boiling
they can't have been boiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I boil?
can you boil?
can he boil?
can we boil?
can you boil?
can they boil? 	can I be boiling?
can you be boiling?
can he be boiling?
can we be boiling?
can you be boiling?
can they be boiling? 	can I have boiled?
can you have boiled?
can he have boiled?
can we have boiled?
can you have boiled?
can they have boiled? 	can I have been boiling?
can you have been boiling?
can he have been boiling?
can we have been boiling?
can you have been boiling?
can they have been boiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I boil?
can't you boil?
can't he boil?
can't we boil?
can't you boil?
can't they boil? 	can't I be boiling?
can't you be boiling?
can't he be boiling?
can't we be boiling?
can't you be boiling?
can't they be boiling? 	can't I have boiled?
can't you have boiled?
can't he have boiled?
can't we have boiled?
can't you have boiled?
can't they have boiled? 	can't I have been boiling?
can't you have been boiling?
can't he have been boiling?
can't we have been boiling?
can't you have been boiling?
can't they have been boiling?