can fail
Verbo regolare: fail - failed- failed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can fail
you can fail
he can fail
we can fail
you can fail
they can fail 	I can be failing
you can be failing
he can be failing
we can be failing
you can be failing
they can be failing	I can have failed
you can have failed
he can have failed
we can have failed
you can have failed
they can have failed	I can have been failing
you can have been failing
he can have been failing
we can have been failing
you can have been failing
they can have been failing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I cannot fail
you cannot fail
he cannot fail
we cannot fail
you cannot fail
they cannot fail 	I cannot be failing
you cannot be failing
he cannot be failing
we cannot be failing
you cannot be failing
they cannot be failing	I cannot have failed
you cannot have failed
he cannot have failed
we cannot have failed
you cannot have failed
they cannot have failed	I cannot have been failing
you cannot have been failing
he cannot have been failing
we cannot have been failing
you cannot have been failing
they cannot have been failing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I fail?
can you fail?
can he fail?
can we fail?
can you fail?
can they fail? 	can I be failing?
can you be failing?
can he be failing?
can we be failing?
can you be failing?
can they be failing? 	can I have failed?
can you have failed?
can he have failed?
can we have failed?
can you have failed?
can they have failed? 	can I have been failing?
can you have been failing?
can he have been failing?
can we have been failing?
can you have been failing?
can they have been failing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I not fail?
can you not fail?
can he not fail?
can we not fail?
can you not fail?
can they not fail? 	can I not be failing?
can you not be failing?
can he not be failing?
can we not be failing?
can you not be failing?
can they not be failing? 	can I not have failed?
can you not have failed?
can he not have failed?
can we not have failed?
can you not have failed?
can they not have failed? 	can I not have been failing?
can you not have been failing?
can he not have been failing?
can we not have been failing?
can you not have been failing?
can they not have been failing?