could intubate
Regular verb: intubate - intubated- intubated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could intubate
you could intubate
she could intubate
we could intubate
you could intubate
they could intubate 	I could be intubating
you could be intubating
she could be intubating
we could be intubating
you could be intubating
they could be intubating	I could have intubated
you could have intubated
she could have intubated
we could have intubated
you could have intubated
they could have intubated	I could have been intubating
you could have been intubating
she could have been intubating
we could have been intubating
you could have been intubating
they could have been intubating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not intubate
you could not intubate
she could not intubate
we could not intubate
you could not intubate
they could not intubate 	I could not be intubating
you could not be intubating
she could not be intubating
we could not be intubating
you could not be intubating
they could not be intubating	I could not have intubated
you could not have intubated
she could not have intubated
we could not have intubated
you could not have intubated
they could not have intubated	I could not have been intubating
you could not have been intubating
she could not have been intubating
we could not have been intubating
you could not have been intubating
they could not have been intubating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I intubate?
could you intubate?
could she intubate?
could we intubate?
could you intubate?
could they intubate? 	could I be intubating?
could you be intubating?
could she be intubating?
could we be intubating?
could you be intubating?
could they be intubating? 	could I have intubated?
could you have intubated?
could she have intubated?
could we have intubated?
could you have intubated?
could they have intubated? 	could I have been intubating?
could you have been intubating?
could she have been intubating?
could we have been intubating?
could you have been intubating?
could they have been intubating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not intubate?
could you not intubate?
could she not intubate?
could we not intubate?
could you not intubate?
could they not intubate? 	could I not be intubating?
could you not be intubating?
could she not be intubating?
could we not be intubating?
could you not be intubating?
could they not be intubating? 	could I not have intubated?
could you not have intubated?
could she not have intubated?
could we not have intubated?
could you not have intubated?
could they not have intubated? 	could I not have been intubating?
could you not have been intubating?
could she not have been intubating?
could we not have been intubating?
could you not have been intubating?
could they not have been intubating?