could tetanize
Regular verb: tetanize - tetanized- tetanized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tetanize
you could tetanize
he could tetanize
we could tetanize
you could tetanize
they could tetanize 	I could be tetanizing
you could be tetanizing
he could be tetanizing
we could be tetanizing
you could be tetanizing
they could be tetanizing	I could have tetanized
you could have tetanized
he could have tetanized
we could have tetanized
you could have tetanized
they could have tetanized	I could have been tetanizing
you could have been tetanizing
he could have been tetanizing
we could have been tetanizing
you could have been tetanizing
they could have been tetanizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not tetanize
you could not tetanize
he could not tetanize
we could not tetanize
you could not tetanize
they could not tetanize 	I could not be tetanizing
you could not be tetanizing
he could not be tetanizing
we could not be tetanizing
you could not be tetanizing
they could not be tetanizing	I could not have tetanized
you could not have tetanized
he could not have tetanized
we could not have tetanized
you could not have tetanized
they could not have tetanized	I could not have been tetanizing
you could not have been tetanizing
he could not have been tetanizing
we could not have been tetanizing
you could not have been tetanizing
they could not have been tetanizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tetanize?
could you tetanize?
could he tetanize?
could we tetanize?
could you tetanize?
could they tetanize? 	could I be tetanizing?
could you be tetanizing?
could he be tetanizing?
could we be tetanizing?
could you be tetanizing?
could they be tetanizing? 	could I have tetanized?
could you have tetanized?
could he have tetanized?
could we have tetanized?
could you have tetanized?
could they have tetanized? 	could I have been tetanizing?
could you have been tetanizing?
could he have been tetanizing?
could we have been tetanizing?
could you have been tetanizing?
could they have been tetanizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not tetanize?
could you not tetanize?
could he not tetanize?
could we not tetanize?
could you not tetanize?
could they not tetanize? 	could I not be tetanizing?
could you not be tetanizing?
could he not be tetanizing?
could we not be tetanizing?
could you not be tetanizing?
could they not be tetanizing? 	could I not have tetanized?
could you not have tetanized?
could he not have tetanized?
could we not have tetanized?
could you not have tetanized?
could they not have tetanized? 	could I not have been tetanizing?
could you not have been tetanizing?
could he not have been tetanizing?
could we not have been tetanizing?
could you not have been tetanizing?
could they not have been tetanizing?