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 can't pioneer
you can't pioneer
he can't pioneer
we can't pioneer
you can't pioneer
they can't pioneer 	I can't be pioneering
you can't be pioneering
he can't be pioneering
we can't be pioneering
you can't be pioneering
they can't be pioneering	I can't have pioneered
you can't have pioneered
he can't have pioneered
we can't have pioneered
you can't have pioneered
they can't have pioneered	I can't have been pioneering
you can't have been pioneering
he can't have been pioneering
we can't have been pioneering
you can't have been pioneering
they can't 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't I pioneer?
can't you pioneer?
can't he pioneer?
can't we pioneer?
can't you pioneer?
can't they pioneer? 	can't I be pioneering?
can't you be pioneering?
can't he be pioneering?
can't we be pioneering?
can't you be pioneering?
can't they be pioneering? 	can't I have pioneered?
can't you have pioneered?
can't he have pioneered?
can't we have pioneered?
can't you have pioneered?
can't they have pioneered? 	can't I have been pioneering?
can't you have been pioneering?
can't he have been pioneering?
can't we have been pioneering?
can't you have been pioneering?
can't they have been pioneering?