can tongue
Regular verb: tongue - tongued- tongued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tongue
you can tongue
he can tongue
we can tongue
you can tongue
they can tongue 	I can be tonguing
you can be tonguing
he can be tonguing
we can be tonguing
you can be tonguing
they can be tonguing	I can have tongued
you can have tongued
he can have tongued
we can have tongued
you can have tongued
they can have tongued	I can have been tonguing
you can have been tonguing
he can have been tonguing
we can have been tonguing
you can have been tonguing
they can have been tonguing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't tongue
you can't tongue
he can't tongue
we can't tongue
you can't tongue
they can't tongue 	I can't be tonguing
you can't be tonguing
he can't be tonguing
we can't be tonguing
you can't be tonguing
they can't be tonguing	I can't have tongued
you can't have tongued
he can't have tongued
we can't have tongued
you can't have tongued
they can't have tongued	I can't have been tonguing
you can't have been tonguing
he can't have been tonguing
we can't have been tonguing
you can't have been tonguing
they can't have been tonguing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tongue?
can you tongue?
can he tongue?
can we tongue?
can you tongue?
can they tongue? 	can I be tonguing?
can you be tonguing?
can he be tonguing?
can we be tonguing?
can you be tonguing?
can they be tonguing? 	can I have tongued?
can you have tongued?
can he have tongued?
can we have tongued?
can you have tongued?
can they have tongued? 	can I have been tonguing?
can you have been tonguing?
can he have been tonguing?
can we have been tonguing?
can you have been tonguing?
can they have been tonguing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I tongue?
can't you tongue?
can't he tongue?
can't we tongue?
can't you tongue?
can't they tongue? 	can't I be tonguing?
can't you be tonguing?
can't he be tonguing?
can't we be tonguing?
can't you be tonguing?
can't they be tonguing? 	can't I have tongued?
can't you have tongued?
can't he have tongued?
can't we have tongued?
can't you have tongued?
can't they have tongued? 	can't I have been tonguing?
can't you have been tonguing?
can't he have been tonguing?
can't we have been tonguing?
can't you have been tonguing?
can't they have been tonguing?