can pith
Regular verb: pith - pithed- pithed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can pith
you can pith
he can pith
we can pith
you can pith
they can pith 	I can be pithing
you can be pithing
he can be pithing
we can be pithing
you can be pithing
they can be pithing	I can have pithed
you can have pithed
he can have pithed
we can have pithed
you can have pithed
they can have pithed	I can have been pithing
you can have been pithing
he can have been pithing
we can have been pithing
you can have been pithing
they can have been pithing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot pith
you cannot pith
he cannot pith
we cannot pith
you cannot pith
they cannot pith 	I cannot be pithing
you cannot be pithing
he cannot be pithing
we cannot be pithing
you cannot be pithing
they cannot be pithing	I cannot have pithed
you cannot have pithed
he cannot have pithed
we cannot have pithed
you cannot have pithed
they cannot have pithed	I cannot have been pithing
you cannot have been pithing
he cannot have been pithing
we cannot have been pithing
you cannot have been pithing
they cannot have been pithing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I pith?
can you pith?
can he pith?
can we pith?
can you pith?
can they pith? 	can I be pithing?
can you be pithing?
can he be pithing?
can we be pithing?
can you be pithing?
can they be pithing? 	can I have pithed?
can you have pithed?
can he have pithed?
can we have pithed?
can you have pithed?
can they have pithed? 	can I have been pithing?
can you have been pithing?
can he have been pithing?
can we have been pithing?
can you have been pithing?
can they have been pithing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not pith?
can you not pith?
can he not pith?
can we not pith?
can you not pith?
can they not pith? 	can I not be pithing?
can you not be pithing?
can he not be pithing?
can we not be pithing?
can you not be pithing?
can they not be pithing? 	can I not have pithed?
can you not have pithed?
can he not have pithed?
can we not have pithed?
can you not have pithed?
can they not have pithed? 	can I not have been pithing?
can you not have been pithing?
can he not have been pithing?
can we not have been pithing?
can you not have been pithing?
can they not have been pithing?