could tetanise
Regular verb: tetanise - tetanised- tetanised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tetanise
you could tetanise
he could tetanise
we could tetanise
you could tetanise
they could tetanise 	I could be tetanising
you could be tetanising
he could be tetanising
we could be tetanising
you could be tetanising
they could be tetanising	I could have tetanised
you could have tetanised
he could have tetanised
we could have tetanised
you could have tetanised
they could have tetanised	I could have been tetanising
you could have been tetanising
he could have been tetanising
we could have been tetanising
you could have been tetanising
they could have been tetanising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tetanise
you couldn't tetanise
he couldn't tetanise
we couldn't tetanise
you couldn't tetanise
they couldn't tetanise 	I couldn't be tetanising
you couldn't be tetanising
he couldn't be tetanising
we couldn't be tetanising
you couldn't be tetanising
they couldn't be tetanising	I couldn't have tetanised
you couldn't have tetanised
he couldn't have tetanised
we couldn't have tetanised
you couldn't have tetanised
they couldn't have tetanised	I couldn't have been tetanising
you couldn't have been tetanising
he couldn't have been tetanising
we couldn't have been tetanising
you couldn't have been tetanising
they couldn't have been tetanising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tetanise?
could you tetanise?
could he tetanise?
could we tetanise?
could you tetanise?
could they tetanise? 	could I be tetanising?
could you be tetanising?
could he be tetanising?
could we be tetanising?
could you be tetanising?
could they be tetanising? 	could I have tetanised?
could you have tetanised?
could he have tetanised?
could we have tetanised?
could you have tetanised?
could they have tetanised? 	could I have been tetanising?
could you have been tetanising?
could he have been tetanising?
could we have been tetanising?
could you have been tetanising?
could they have been tetanising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tetanise?
couldn't you tetanise?
couldn't he tetanise?
couldn't we tetanise?
couldn't you tetanise?
couldn't they tetanise? 	couldn't I be tetanising?
couldn't you be tetanising?
couldn't he be tetanising?
couldn't we be tetanising?
couldn't you be tetanising?
couldn't they be tetanising? 	couldn't I have tetanised?
couldn't you have tetanised?
couldn't he have tetanised?
couldn't we have tetanised?
couldn't you have tetanised?
couldn't they have tetanised? 	couldn't I have been tetanising?
couldn't you have been tetanising?
couldn't he have been tetanising?
couldn't we have been tetanising?
couldn't you have been tetanising?
couldn't they have been tetanising?