must crawl
Verbo regular: crawl - crawled- crawled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must crawl
you must crawl
she must crawl
we must crawl
you must crawl
they must crawl 	I must be crawling
you must be crawling
she must be crawling
we must be crawling
you must be crawling
they must be crawling	I must have crawled
you must have crawled
she must have crawled
we must have crawled
you must have crawled
they must have crawled	I must have been crawling
you must have been crawling
she must have been crawling
we must have been crawling
you must have been crawling
they must have been crawling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not crawl
you must not crawl
she must not crawl
we must not crawl
you must not crawl
they must not crawl 	I must not be crawling
you must not be crawling
she must not be crawling
we must not be crawling
you must not be crawling
they must not be crawling	I must not have crawled
you must not have crawled
she must not have crawled
we must not have crawled
you must not have crawled
they must not have crawled	I must not have been crawling
you must not have been crawling
she must not have been crawling
we must not have been crawling
you must not have been crawling
they must not have been crawling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I crawl?
must you crawl?
must she crawl?
must we crawl?
must you crawl?
must they crawl? 	must I be crawling?
must you be crawling?
must she be crawling?
must we be crawling?
must you be crawling?
must they be crawling? 	must I have crawled?
must you have crawled?
must she have crawled?
must we have crawled?
must you have crawled?
must they have crawled? 	must I have been crawling?
must you have been crawling?
must she have been crawling?
must we have been crawling?
must you have been crawling?
must they have been crawling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not crawl?
must you not crawl?
must she not crawl?
must we not crawl?
must you not crawl?
must they not crawl? 	must I not be crawling?
must you not be crawling?
must she not be crawling?
must we not be crawling?
must you not be crawling?
must they not be crawling? 	must I not have crawled?
must you not have crawled?
must she not have crawled?
must we not have crawled?
must you not have crawled?
must they not have crawled? 	must I not have been crawling?
must you not have been crawling?
must she not have been crawling?
must we not have been crawling?
must you not have been crawling?
must they not have been crawling?