I can summarize you can summarize he can summarize we can summarize you can summarize they can summarize
V-ing form
I can be summarizing you can be summarizing he can be summarizing we can be summarizing you can be summarizing they can be summarizing
Perfect
I can have summarized you can have summarized he can have summarized we can have summarized you can have summarized they can have summarized
V-ing perfect
I can have been summarizing you can have been summarizing he can have been summarizing we can have been summarizing you can have been summarizing they can have been summarizing
Negation
Simple form
I cannot summarize you cannot summarize he cannot summarize we cannot summarize you cannot summarize they cannot summarize
V-ing form
I cannot be summarizing you cannot be summarizing he cannot be summarizing we cannot be summarizing you cannot be summarizing they cannot be summarizing
Perfect
I cannot have summarized you cannot have summarized he cannot have summarized we cannot have summarized you cannot have summarized they cannot have summarized
V-ing perfect
I cannot have been summarizing you cannot have been summarizing he cannot have been summarizing we cannot have been summarizing you cannot have been summarizing they cannot have been summarizing
Interrogative form
Simple form
can I summarize? can you summarize? can he summarize? can we summarize? can you summarize? can they summarize?
V-ing form
can I be summarizing? can you be summarizing? can he be summarizing? can we be summarizing? can you be summarizing? can they be summarizing?
Perfect
can I have summarized? can you have summarized? can he have summarized? can we have summarized? can you have summarized? can they have summarized?
V-ing perfect
can I have been summarizing? can you have been summarizing? can he have been summarizing? can we have been summarizing? can you have been summarizing? can they have been summarizing?
Interro-negative form
Simple form
can I not summarize? can you not summarize? can he not summarize? can we not summarize? can you not summarize? can they not summarize?
V-ing form
can I not be summarizing? can you not be summarizing? can he not be summarizing? can we not be summarizing? can you not be summarizing? can they not be summarizing?
Perfect
can I not have summarized? can you not have summarized? can he not have summarized? can we not have summarized? can you not have summarized? can they not have summarized?
V-ing perfect
can I not have been summarizing? can you not have been summarizing? can he not have been summarizing? can we not have been summarizing? can you not have been summarizing? can they not have been summarizing?