can humbug
Regular verb: humbug - humbugged- humbugged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can humbug
you can humbug
he can humbug
we can humbug
you can humbug
they can humbug 	I can be humbugging
you can be humbugging
he can be humbugging
we can be humbugging
you can be humbugging
they can be humbugging	I can have humbugged
you can have humbugged
he can have humbugged
we can have humbugged
you can have humbugged
they can have humbugged	I can have been humbugging
you can have been humbugging
he can have been humbugging
we can have been humbugging
you can have been humbugging
they can have been humbugging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot humbug
you cannot humbug
he cannot humbug
we cannot humbug
you cannot humbug
they cannot humbug 	I cannot be humbugging
you cannot be humbugging
he cannot be humbugging
we cannot be humbugging
you cannot be humbugging
they cannot be humbugging	I cannot have humbugged
you cannot have humbugged
he cannot have humbugged
we cannot have humbugged
you cannot have humbugged
they cannot have humbugged	I cannot have been humbugging
you cannot have been humbugging
he cannot have been humbugging
we cannot have been humbugging
you cannot have been humbugging
they cannot have been humbugging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I humbug?
can you humbug?
can he humbug?
can we humbug?
can you humbug?
can they humbug? 	can I be humbugging?
can you be humbugging?
can he be humbugging?
can we be humbugging?
can you be humbugging?
can they be humbugging? 	can I have humbugged?
can you have humbugged?
can he have humbugged?
can we have humbugged?
can you have humbugged?
can they have humbugged? 	can I have been humbugging?
can you have been humbugging?
can he have been humbugging?
can we have been humbugging?
can you have been humbugging?
can they have been humbugging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not humbug?
can you not humbug?
can he not humbug?
can we not humbug?
can you not humbug?
can they not humbug? 	can I not be humbugging?
can you not be humbugging?
can he not be humbugging?
can we not be humbugging?
can you not be humbugging?
can they not be humbugging? 	can I not have humbugged?
can you not have humbugged?
can he not have humbugged?
can we not have humbugged?
can you not have humbugged?
can they not have humbugged? 	can I not have been humbugging?
can you not have been humbugging?
can he not have been humbugging?
can we not have been humbugging?
can you not have been humbugging?
can they not have been humbugging?