can crawl
Regular verb: crawl - crawled- crawled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can crawl
you can crawl
she can crawl
we can crawl
you can crawl
they can crawl 	I can be crawling
you can be crawling
she can be crawling
we can be crawling
you can be crawling
they can be crawling	I can have crawled
you can have crawled
she can have crawled
we can have crawled
you can have crawled
they can have crawled	I can have been crawling
you can have been crawling
she can have been crawling
we can have been crawling
you can have been crawling
they can have been crawling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot crawl
you cannot crawl
she cannot crawl
we cannot crawl
you cannot crawl
they cannot crawl 	I cannot be crawling
you cannot be crawling
she cannot be crawling
we cannot be crawling
you cannot be crawling
they cannot be crawling	I cannot have crawled
you cannot have crawled
she cannot have crawled
we cannot have crawled
you cannot have crawled
they cannot have crawled	I cannot have been crawling
you cannot have been crawling
she cannot have been crawling
we cannot have been crawling
you cannot have been crawling
they cannot have been crawling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I crawl?
can you crawl?
can she crawl?
can we crawl?
can you crawl?
can they crawl? 	can I be crawling?
can you be crawling?
can she be crawling?
can we be crawling?
can you be crawling?
can they be crawling? 	can I have crawled?
can you have crawled?
can she have crawled?
can we have crawled?
can you have crawled?
can they have crawled? 	can I have been crawling?
can you have been crawling?
can she have been crawling?
can we have been crawling?
can you have been crawling?
can they have been crawling? 	

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