can tooth
Regular verb: tooth - toothed- toothed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tooth
you can tooth
he can tooth
we can tooth
you can tooth
they can tooth 	I can be toothing
you can be toothing
he can be toothing
we can be toothing
you can be toothing
they can be toothing	I can have toothed
you can have toothed
he can have toothed
we can have toothed
you can have toothed
they can have toothed	I can have been toothing
you can have been toothing
he can have been toothing
we can have been toothing
you can have been toothing
they can have been toothing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot tooth
you cannot tooth
he cannot tooth
we cannot tooth
you cannot tooth
they cannot tooth 	I cannot be toothing
you cannot be toothing
he cannot be toothing
we cannot be toothing
you cannot be toothing
they cannot be toothing	I cannot have toothed
you cannot have toothed
he cannot have toothed
we cannot have toothed
you cannot have toothed
they cannot have toothed	I cannot have been toothing
you cannot have been toothing
he cannot have been toothing
we cannot have been toothing
you cannot have been toothing
they cannot have been toothing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tooth?
can you tooth?
can he tooth?
can we tooth?
can you tooth?
can they tooth? 	can I be toothing?
can you be toothing?
can he be toothing?
can we be toothing?
can you be toothing?
can they be toothing? 	can I have toothed?
can you have toothed?
can he have toothed?
can we have toothed?
can you have toothed?
can they have toothed? 	can I have been toothing?
can you have been toothing?
can he have been toothing?
can we have been toothing?
can you have been toothing?
can they have been toothing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not tooth?
can you not tooth?
can he not tooth?
can we not tooth?
can you not tooth?
can they not tooth? 	can I not be toothing?
can you not be toothing?
can he not be toothing?
can we not be toothing?
can you not be toothing?
can they not be toothing? 	can I not have toothed?
can you not have toothed?
can he not have toothed?
can we not have toothed?
can you not have toothed?
can they not have toothed? 	can I not have been toothing?
can you not have been toothing?
can he not have been toothing?
can we not have been toothing?
can you not have been toothing?
can they not have been toothing?