could instruct
Regular verb: instruct - instructed- instructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could instruct
you could instruct
she could instruct
we could instruct
you could instruct
they could instruct 	I could be instructing
you could be instructing
she could be instructing
we could be instructing
you could be instructing
they could be instructing	I could have instructed
you could have instructed
she could have instructed
we could have instructed
you could have instructed
they could have instructed	I could have been instructing
you could have been instructing
she could have been instructing
we could have been instructing
you could have been instructing
they could have been instructing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't instruct
you couldn't instruct
she couldn't instruct
we couldn't instruct
you couldn't instruct
they couldn't instruct 	I couldn't be instructing
you couldn't be instructing
she couldn't be instructing
we couldn't be instructing
you couldn't be instructing
they couldn't be instructing	I couldn't have instructed
you couldn't have instructed
she couldn't have instructed
we couldn't have instructed
you couldn't have instructed
they couldn't have instructed	I couldn't have been instructing
you couldn't have been instructing
she couldn't have been instructing
we couldn't have been instructing
you couldn't have been instructing
they couldn't have been instructing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I instruct?
could you instruct?
could she instruct?
could we instruct?
could you instruct?
could they instruct? 	could I be instructing?
could you be instructing?
could she be instructing?
could we be instructing?
could you be instructing?
could they be instructing? 	could I have instructed?
could you have instructed?
could she have instructed?
could we have instructed?
could you have instructed?
could they have instructed? 	could I have been instructing?
could you have been instructing?
could she have been instructing?
could we have been instructing?
could you have been instructing?
could they have been instructing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I instruct?
couldn't you instruct?
couldn't she instruct?
couldn't we instruct?
couldn't you instruct?
couldn't they instruct? 	couldn't I be instructing?
couldn't you be instructing?
couldn't she be instructing?
couldn't we be instructing?
couldn't you be instructing?
couldn't they be instructing? 	couldn't I have instructed?
couldn't you have instructed?
couldn't she have instructed?
couldn't we have instructed?
couldn't you have instructed?
couldn't they have instructed? 	couldn't I have been instructing?
couldn't you have been instructing?
couldn't she have been instructing?
couldn't we have been instructing?
couldn't you have been instructing?
couldn't they have been instructing?