can pioneer
Regular verb: pioneer - pioneered- pioneered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can pioneer
you can pioneer
he can pioneer
we can pioneer
you can pioneer
they can pioneer 	I can be pioneering
you can be pioneering
he can be pioneering
we can be pioneering
you can be pioneering
they can be pioneering	I can have pioneered
you can have pioneered
he can have pioneered
we can have pioneered
you can have pioneered
they can have pioneered	I can have been pioneering
you can have been pioneering
he can have been pioneering
we can have been pioneering
you can have been pioneering
they can have been pioneering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot pioneer
you cannot pioneer
he cannot pioneer
we cannot pioneer
you cannot pioneer
they cannot pioneer 	I cannot be pioneering
you cannot be pioneering
he cannot be pioneering
we cannot be pioneering
you cannot be pioneering
they cannot be pioneering	I cannot have pioneered
you cannot have pioneered
he cannot have pioneered
we cannot have pioneered
you cannot have pioneered
they cannot have pioneered	I cannot have been pioneering
you cannot have been pioneering
he cannot have been pioneering
we cannot have been pioneering
you cannot have been pioneering
they cannot have been pioneering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I pioneer?
can you pioneer?
can he pioneer?
can we pioneer?
can you pioneer?
can they pioneer? 	can I be pioneering?
can you be pioneering?
can he be pioneering?
can we be pioneering?
can you be pioneering?
can they be pioneering? 	can I have pioneered?
can you have pioneered?
can he have pioneered?
can we have pioneered?
can you have pioneered?
can they have pioneered? 	can I have been pioneering?
can you have been pioneering?
can he have been pioneering?
can we have been pioneering?
can you have been pioneering?
can they have been pioneering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not pioneer?
can you not pioneer?
can he not pioneer?
can we not pioneer?
can you not pioneer?
can they not pioneer? 	can I not be pioneering?
can you not be pioneering?
can he not be pioneering?
can we not be pioneering?
can you not be pioneering?
can they not be pioneering? 	can I not have pioneered?
can you not have pioneered?
can he not have pioneered?
can we not have pioneered?
can you not have pioneered?
can they not have pioneered? 	can I not have been pioneering?
can you not have been pioneering?
can he not have been pioneering?
can we not have been pioneering?
can you not have been pioneering?
can they not have been pioneering?