can doctor
Verbo regular: doctor - doctored- doctored

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can doctor
you can doctor
he can doctor
we can doctor
you can doctor
they can doctor 	I can be doctoring
you can be doctoring
he can be doctoring
we can be doctoring
you can be doctoring
they can be doctoring	I can have doctored
you can have doctored
he can have doctored
we can have doctored
you can have doctored
they can have doctored	I can have been doctoring
you can have been doctoring
he can have been doctoring
we can have been doctoring
you can have been doctoring
they can have been doctoring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot doctor
you cannot doctor
he cannot doctor
we cannot doctor
you cannot doctor
they cannot doctor 	I cannot be doctoring
you cannot be doctoring
he cannot be doctoring
we cannot be doctoring
you cannot be doctoring
they cannot be doctoring	I cannot have doctored
you cannot have doctored
he cannot have doctored
we cannot have doctored
you cannot have doctored
they cannot have doctored	I cannot have been doctoring
you cannot have been doctoring
he cannot have been doctoring
we cannot have been doctoring
you cannot have been doctoring
they cannot have been doctoring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I doctor?
can you doctor?
can he doctor?
can we doctor?
can you doctor?
can they doctor? 	can I be doctoring?
can you be doctoring?
can he be doctoring?
can we be doctoring?
can you be doctoring?
can they be doctoring? 	can I have doctored?
can you have doctored?
can he have doctored?
can we have doctored?
can you have doctored?
can they have doctored? 	can I have been doctoring?
can you have been doctoring?
can he have been doctoring?
can we have been doctoring?
can you have been doctoring?
can they have been doctoring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not doctor?
can you not doctor?
can he not doctor?
can we not doctor?
can you not doctor?
can they not doctor? 	can I not be doctoring?
can you not be doctoring?
can he not be doctoring?
can we not be doctoring?
can you not be doctoring?
can they not be doctoring? 	can I not have doctored?
can you not have doctored?
can he not have doctored?
can we not have doctored?
can you not have doctored?
can they not have doctored? 	can I not have been doctoring?
can you not have been doctoring?
can he not have been doctoring?
can we not have been doctoring?
can you not have been doctoring?
can they not have been doctoring?