I can instruct you can instruct he can instruct we can instruct you can instruct they can instruct
V-ing form
I can be instructing you can be instructing he can be instructing we can be instructing you can be instructing they can be instructing
Perfect
I can have instructed you can have instructed he can have instructed we can have instructed you can have instructed they can have instructed
V-ing perfect
I can have been instructing you can have been instructing he can have been instructing we can have been instructing you can have been instructing they can have been instructing
Negation
Simple form
I can't instruct you can't instruct he can't instruct we can't instruct you can't instruct they can't instruct
V-ing form
I can't be instructing you can't be instructing he can't be instructing we can't be instructing you can't be instructing they can't be instructing
Perfect
I can't have instructed you can't have instructed he can't have instructed we can't have instructed you can't have instructed they can't have instructed
V-ing perfect
I can't have been instructing you can't have been instructing he can't have been instructing we can't have been instructing you can't have been instructing they can't have been instructing
Interrogative form
Simple form
can I instruct? can you instruct? can he instruct? can we instruct? can you instruct? can they instruct?
V-ing form
can I be instructing? can you be instructing? can he be instructing? can we be instructing? can you be instructing? can they be instructing?
Perfect
can I have instructed? can you have instructed? can he have instructed? can we have instructed? can you have instructed? can they have instructed?
V-ing perfect
can I have been instructing? can you have been instructing? can he have been instructing? can we have been instructing? can you have been instructing? can they have been instructing?
Interro-negative form
Simple form
can't I instruct? can't you instruct? can't he instruct? can't we instruct? can't you instruct? can't they instruct?
V-ing form
can't I be instructing? can't you be instructing? can't he be instructing? can't we be instructing? can't you be instructing? can't they be instructing?
Perfect
can't I have instructed? can't you have instructed? can't he have instructed? can't we have instructed? can't you have instructed? can't they have instructed?
V-ing perfect
can't I have been instructing? can't you have been instructing? can't he have been instructing? can't we have been instructing? can't you have been instructing? can't they have been instructing?