I can reject you can reject he can reject we can reject you can reject they can reject
V-ing form
I can be rejecting you can be rejecting he can be rejecting we can be rejecting you can be rejecting they can be rejecting
Perfect
I can have rejected you can have rejected he can have rejected we can have rejected you can have rejected they can have rejected
V-ing perfect
I can have been rejecting you can have been rejecting he can have been rejecting we can have been rejecting you can have been rejecting they can have been rejecting
Negation
Simple form
I can't reject you can't reject he can't reject we can't reject you can't reject they can't reject
V-ing form
I can't be rejecting you can't be rejecting he can't be rejecting we can't be rejecting you can't be rejecting they can't be rejecting
Perfect
I can't have rejected you can't have rejected he can't have rejected we can't have rejected you can't have rejected they can't have rejected
V-ing perfect
I can't have been rejecting you can't have been rejecting he can't have been rejecting we can't have been rejecting you can't have been rejecting they can't have been rejecting
Interrogative form
Simple form
can I reject? can you reject? can he reject? can we reject? can you reject? can they reject?
V-ing form
can I be rejecting? can you be rejecting? can he be rejecting? can we be rejecting? can you be rejecting? can they be rejecting?
Perfect
can I have rejected? can you have rejected? can he have rejected? can we have rejected? can you have rejected? can they have rejected?
V-ing perfect
can I have been rejecting? can you have been rejecting? can he have been rejecting? can we have been rejecting? can you have been rejecting? can they have been rejecting?
Interro-negative form
Simple form
can't I reject? can't you reject? can't he reject? can't we reject? can't you reject? can't they reject?
V-ing form
can't I be rejecting? can't you be rejecting? can't he be rejecting? can't we be rejecting? can't you be rejecting? can't they be rejecting?
Perfect
can't I have rejected? can't you have rejected? can't he have rejected? can't we have rejected? can't you have rejected? can't they have rejected?
V-ing perfect
can't I have been rejecting? can't you have been rejecting? can't he have been rejecting? can't we have been rejecting? can't you have been rejecting? can't they have been rejecting?