could luteinize
Regular verb: luteinize - luteinized- luteinized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could luteinize
you could luteinize
she could luteinize
we could luteinize
you could luteinize
they could luteinize 	I could be luteinizing
you could be luteinizing
she could be luteinizing
we could be luteinizing
you could be luteinizing
they could be luteinizing	I could have luteinized
you could have luteinized
she could have luteinized
we could have luteinized
you could have luteinized
they could have luteinized	I could have been luteinizing
you could have been luteinizing
she could have been luteinizing
we could have been luteinizing
you could have been luteinizing
they could have been luteinizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't luteinize
you couldn't luteinize
she couldn't luteinize
we couldn't luteinize
you couldn't luteinize
they couldn't luteinize 	I couldn't be luteinizing
you couldn't be luteinizing
she couldn't be luteinizing
we couldn't be luteinizing
you couldn't be luteinizing
they couldn't be luteinizing	I couldn't have luteinized
you couldn't have luteinized
she couldn't have luteinized
we couldn't have luteinized
you couldn't have luteinized
they couldn't have luteinized	I couldn't have been luteinizing
you couldn't have been luteinizing
she couldn't have been luteinizing
we couldn't have been luteinizing
you couldn't have been luteinizing
they couldn't have been luteinizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I luteinize?
could you luteinize?
could she luteinize?
could we luteinize?
could you luteinize?
could they luteinize? 	could I be luteinizing?
could you be luteinizing?
could she be luteinizing?
could we be luteinizing?
could you be luteinizing?
could they be luteinizing? 	could I have luteinized?
could you have luteinized?
could she have luteinized?
could we have luteinized?
could you have luteinized?
could they have luteinized? 	could I have been luteinizing?
could you have been luteinizing?
could she have been luteinizing?
could we have been luteinizing?
could you have been luteinizing?
could they have been luteinizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I luteinize?
couldn't you luteinize?
couldn't she luteinize?
couldn't we luteinize?
couldn't you luteinize?
couldn't they luteinize? 	couldn't I be luteinizing?
couldn't you be luteinizing?
couldn't she be luteinizing?
couldn't we be luteinizing?
couldn't you be luteinizing?
couldn't they be luteinizing? 	couldn't I have luteinized?
couldn't you have luteinized?
couldn't she have luteinized?
couldn't we have luteinized?
couldn't you have luteinized?
couldn't they have luteinized? 	couldn't I have been luteinizing?
couldn't you have been luteinizing?
couldn't she have been luteinizing?
couldn't we have been luteinizing?
couldn't you have been luteinizing?
couldn't they have been luteinizing?