I can inject you can inject she can inject we can inject you can inject they can inject
V-ing form
I can be injecting you can be injecting she can be injecting we can be injecting you can be injecting they can be injecting
Perfect
I can have injected you can have injected she can have injected we can have injected you can have injected they can have injected
V-ing perfect
I can have been injecting you can have been injecting she can have been injecting we can have been injecting you can have been injecting they can have been injecting
Negation
Simple form
I can't inject you can't inject she can't inject we can't inject you can't inject they can't inject
V-ing form
I can't be injecting you can't be injecting she can't be injecting we can't be injecting you can't be injecting they can't be injecting
Perfect
I can't have injected you can't have injected she can't have injected we can't have injected you can't have injected they can't have injected
V-ing perfect
I can't have been injecting you can't have been injecting she can't have been injecting we can't have been injecting you can't have been injecting they can't have been injecting
Interrogative form
Simple form
can I inject? can you inject? can she inject? can we inject? can you inject? can they inject?
V-ing form
can I be injecting? can you be injecting? can she be injecting? can we be injecting? can you be injecting? can they be injecting?
Perfect
can I have injected? can you have injected? can she have injected? can we have injected? can you have injected? can they have injected?
V-ing perfect
can I have been injecting? can you have been injecting? can she have been injecting? can we have been injecting? can you have been injecting? can they have been injecting?
Interro-negative form
Simple form
can't I inject? can't you inject? can't she inject? can't we inject? can't you inject? can't they inject?
V-ing form
can't I be injecting? can't you be injecting? can't she be injecting? can't we be injecting? can't you be injecting? can't they be injecting?
Perfect
can't I have injected? can't you have injected? can't she have injected? can't we have injected? can't you have injected? can't they have injected?
V-ing perfect
can't I have been injecting? can't you have been injecting? can't she have been injecting? can't we have been injecting? can't you have been injecting? can't they have been injecting?