could deoxygenate
Regular verb: deoxygenate - deoxygenated- deoxygenated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could deoxygenate
you could deoxygenate
he could deoxygenate
we could deoxygenate
you could deoxygenate
they could deoxygenate 	I could be deoxygenating
you could be deoxygenating
he could be deoxygenating
we could be deoxygenating
you could be deoxygenating
they could be deoxygenating	I could have deoxygenated
you could have deoxygenated
he could have deoxygenated
we could have deoxygenated
you could have deoxygenated
they could have deoxygenated	I could have been deoxygenating
you could have been deoxygenating
he could have been deoxygenating
we could have been deoxygenating
you could have been deoxygenating
they could have been deoxygenating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't deoxygenate
you couldn't deoxygenate
he couldn't deoxygenate
we couldn't deoxygenate
you couldn't deoxygenate
they couldn't deoxygenate 	I couldn't be deoxygenating
you couldn't be deoxygenating
he couldn't be deoxygenating
we couldn't be deoxygenating
you couldn't be deoxygenating
they couldn't be deoxygenating	I couldn't have deoxygenated
you couldn't have deoxygenated
he couldn't have deoxygenated
we couldn't have deoxygenated
you couldn't have deoxygenated
they couldn't have deoxygenated	I couldn't have been deoxygenating
you couldn't have been deoxygenating
he couldn't have been deoxygenating
we couldn't have been deoxygenating
you couldn't have been deoxygenating
they couldn't have been deoxygenating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I deoxygenate?
could you deoxygenate?
could he deoxygenate?
could we deoxygenate?
could you deoxygenate?
could they deoxygenate? 	could I be deoxygenating?
could you be deoxygenating?
could he be deoxygenating?
could we be deoxygenating?
could you be deoxygenating?
could they be deoxygenating? 	could I have deoxygenated?
could you have deoxygenated?
could he have deoxygenated?
could we have deoxygenated?
could you have deoxygenated?
could they have deoxygenated? 	could I have been deoxygenating?
could you have been deoxygenating?
could he have been deoxygenating?
could we have been deoxygenating?
could you have been deoxygenating?
could they have been deoxygenating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I deoxygenate?
couldn't you deoxygenate?
couldn't he deoxygenate?
couldn't we deoxygenate?
couldn't you deoxygenate?
couldn't they deoxygenate? 	couldn't I be deoxygenating?
couldn't you be deoxygenating?
couldn't he be deoxygenating?
couldn't we be deoxygenating?
couldn't you be deoxygenating?
couldn't they be deoxygenating? 	couldn't I have deoxygenated?
couldn't you have deoxygenated?
couldn't he have deoxygenated?
couldn't we have deoxygenated?
couldn't you have deoxygenated?
couldn't they have deoxygenated? 	couldn't I have been deoxygenating?
couldn't you have been deoxygenating?
couldn't he have been deoxygenating?
couldn't we have been deoxygenating?
couldn't you have been deoxygenating?
couldn't they have been deoxygenating?