English verb conjugation
COULD INSTRUCT

Regular verb: instruct - instructed - instructed

Affirmation

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