I may crawl you may crawl she may crawl we may crawl you may crawl they may crawl
V-ing form
I may be crawling you may be crawling she may be crawling we may be crawling you may be crawling they may be crawling
Perfect
I may have crawled you may have crawled she may have crawled we may have crawled you may have crawled they may have crawled
V-ing perfect
I may have been crawling you may have been crawling she may have been crawling we may have been crawling you may have been crawling they may have been crawling
Negation
Simple form
I may not crawl you may not crawl she may not crawl we may not crawl you may not crawl they may not crawl
V-ing form
I may not be crawling you may not be crawling she may not be crawling we may not be crawling you may not be crawling they may not be crawling
Perfect
I may not have crawled you may not have crawled she may not have crawled we may not have crawled you may not have crawled they may not have crawled
V-ing perfect
I may not have been crawling you may not have been crawling she may not have been crawling we may not have been crawling you may not have been crawling they may not have been crawling
Interrogative form
Simple form
may I crawl? may you crawl? may she crawl? may we crawl? may you crawl? may they crawl?
V-ing form
may I be crawling? may you be crawling? may she be crawling? may we be crawling? may you be crawling? may they be crawling?
Perfect
may I have crawled? may you have crawled? may she have crawled? may we have crawled? may you have crawled? may they have crawled?
V-ing perfect
may I have been crawling? may you have been crawling? may she have been crawling? may we have been crawling? may you have been crawling? may they have been crawling?
Interro-negative form
Simple form
may I not crawl? may you not crawl? may she not crawl? may we not crawl? may you not crawl? may they not crawl?
V-ing form
may I not be crawling? may you not be crawling? may she not be crawling? may we not be crawling? may you not be crawling? may they not be crawling?
Perfect
may I not have crawled? may you not have crawled? may she not have crawled? may we not have crawled? may you not have crawled? may they not have crawled?
V-ing perfect
may I not have been crawling? may you not have been crawling? may she not have been crawling? may we not have been crawling? may you not have been crawling? may they not have been crawling?