I may crawl you may crawl he may crawl we may crawl you may crawl they may crawl
V-ing form
I may be crawling you may be crawling he may be crawling we may be crawling you may be crawling they may be crawling
Perfect
I may have crawled you may have crawled he 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 he 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 he 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 he 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 he 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 he 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 he crawl? may we crawl? may you crawl? may they crawl?
V-ing form
may I be crawling? may you be crawling? may he be crawling? may we be crawling? may you be crawling? may they be crawling?
Perfect
may I have crawled? may you have crawled? may he 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 he 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 he 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 he 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 he 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 he not have been crawling? may we not have been crawling? may you not have been crawling? may they not have been crawling?