can enter
Verbo regular: enter - entered- entered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can enter
you can enter
she can enter
we can enter
you can enter
they can enter 	I can be entering
you can be entering
she can be entering
we can be entering
you can be entering
they can be entering	I can have entered
you can have entered
she can have entered
we can have entered
you can have entered
they can have entered	I can have been entering
you can have been entering
she can have been entering
we can have been entering
you can have been entering
they can have been entering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot enter
you cannot enter
she cannot enter
we cannot enter
you cannot enter
they cannot enter 	I cannot be entering
you cannot be entering
she cannot be entering
we cannot be entering
you cannot be entering
they cannot be entering	I cannot have entered
you cannot have entered
she cannot have entered
we cannot have entered
you cannot have entered
they cannot have entered	I cannot have been entering
you cannot have been entering
she cannot have been entering
we cannot have been entering
you cannot have been entering
they cannot have been entering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I enter?
can you enter?
can she enter?
can we enter?
can you enter?
can they enter? 	can I be entering?
can you be entering?
can she be entering?
can we be entering?
can you be entering?
can they be entering? 	can I have entered?
can you have entered?
can she have entered?
can we have entered?
can you have entered?
can they have entered? 	can I have been entering?
can you have been entering?
can she have been entering?
can we have been entering?
can you have been entering?
can they have been entering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not enter?
can you not enter?
can she not enter?
can we not enter?
can you not enter?
can they not enter? 	can I not be entering?
can you not be entering?
can she not be entering?
can we not be entering?
can you not be entering?
can they not be entering? 	can I not have entered?
can you not have entered?
can she not have entered?
can we not have entered?
can you not have entered?
can they not have entered? 	can I not have been entering?
can you not have been entering?
can she not have been entering?
can we not have been entering?
can you not have been entering?
can they not have been entering?