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 mayn't crawl you mayn't crawl he mayn't crawl we mayn't crawl you mayn't crawl they mayn't crawl
V-ing form
I mayn't be crawling you mayn't be crawling he mayn't be crawling we mayn't be crawling you mayn't be crawling they mayn't be crawling
Perfect
I mayn't have crawled you mayn't have crawled he mayn't have crawled we mayn't have crawled you mayn't have crawled they mayn't have crawled
V-ing perfect
I mayn't have been crawling you mayn't have been crawling he mayn't have been crawling we mayn't have been crawling you mayn't have been crawling they mayn't 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
mayn't I crawl? mayn't you crawl? mayn't he crawl? mayn't we crawl? mayn't you crawl? mayn't they crawl?
V-ing form
mayn't I be crawling? mayn't you be crawling? mayn't he be crawling? mayn't we be crawling? mayn't you be crawling? mayn't they be crawling?
Perfect
mayn't I have crawled? mayn't you have crawled? mayn't he have crawled? mayn't we have crawled? mayn't you have crawled? mayn't they have crawled?
V-ing perfect
mayn't I have been crawling? mayn't you have been crawling? mayn't he have been crawling? mayn't we have been crawling? mayn't you have been crawling? mayn't they have been crawling?