I can submit you can submit he can submit we can submit you can submit they can submit
V-ing form
I can be submitting you can be submitting he can be submitting we can be submitting you can be submitting they can be submitting
Perfect
I can have submitted you can have submitted he can have submitted we can have submitted you can have submitted they can have submitted
V-ing perfect
I can have been submitting you can have been submitting he can have been submitting we can have been submitting you can have been submitting they can have been submitting
Negation
Simple form
I cannot submit you cannot submit he cannot submit we cannot submit you cannot submit they cannot submit
V-ing form
I cannot be submitting you cannot be submitting he cannot be submitting we cannot be submitting you cannot be submitting they cannot be submitting
Perfect
I cannot have submitted you cannot have submitted he cannot have submitted we cannot have submitted you cannot have submitted they cannot have submitted
V-ing perfect
I cannot have been submitting you cannot have been submitting he cannot have been submitting we cannot have been submitting you cannot have been submitting they cannot have been submitting
Interrogative form
Simple form
can I submit? can you submit? can he submit? can we submit? can you submit? can they submit?
V-ing form
can I be submitting? can you be submitting? can he be submitting? can we be submitting? can you be submitting? can they be submitting?
Perfect
can I have submitted? can you have submitted? can he have submitted? can we have submitted? can you have submitted? can they have submitted?
V-ing perfect
can I have been submitting? can you have been submitting? can he have been submitting? can we have been submitting? can you have been submitting? can they have been submitting?
Interro-negative form
Simple form
can I not submit? can you not submit? can he not submit? can we not submit? can you not submit? can they not submit?
V-ing form
can I not be submitting? can you not be submitting? can he not be submitting? can we not be submitting? can you not be submitting? can they not be submitting?
Perfect
can I not have submitted? can you not have submitted? can he not have submitted? can we not have submitted? can you not have submitted? can they not have submitted?
V-ing perfect
can I not have been submitting? can you not have been submitting? can he not have been submitting? can we not have been submitting? can you not have been submitting? can they not have been submitting?