I can crawl you can crawl he can crawl we can crawl you can crawl they can crawl
Forma con V-ing
I can be crawling you can be crawling he can be crawling we can be crawling you can be crawling they can be crawling
Perfecto
I can have crawled you can have crawled he can have crawled we can have crawled you can have crawled they can have crawled
Perfecto con V-ing
I can have been crawling you can have been crawling he can have been crawling we can have been crawling you can have been crawling they can have been crawling
Negación
Forma simple
I cannot crawl you cannot crawl he cannot crawl we cannot crawl you cannot crawl they cannot crawl
Forma con V-ing
I cannot be crawling you cannot be crawling he cannot be crawling we cannot be crawling you cannot be crawling they cannot be crawling
Perfecto
I cannot have crawled you cannot have crawled he cannot have crawled we cannot have crawled you cannot have crawled they cannot have crawled
Perfecto con V-ing
I cannot have been crawling you cannot have been crawling he cannot have been crawling we cannot have been crawling you cannot have been crawling they cannot have been crawling
Forma interrogativa
Forma simple
can I crawl? can you crawl? can he crawl? can we crawl? can you crawl? can they crawl?
Forma con V-ing
can I be crawling? can you be crawling? can he be crawling? can we be crawling? can you be crawling? can they be crawling?
Perfecto
can I have crawled? can you have crawled? can he have crawled? can we have crawled? can you have crawled? can they have crawled?
Perfecto con V-ing
can I have been crawling? can you have been crawling? can he have been crawling? can we have been crawling? can you have been crawling? can they have been crawling?
Forma interro-negativa
Forma simple
can I not crawl? can you not crawl? can he not crawl? can we not crawl? can you not crawl? can they not crawl?
Forma con V-ing
can I not be crawling? can you not be crawling? can he not be crawling? can we not be crawling? can you not be crawling? can they not be crawling?
Perfecto
can I not have crawled? can you not have crawled? can he not have crawled? can we not have crawled? can you not have crawled? can they not have crawled?
Perfecto con V-ing
can I not have been crawling? can you not have been crawling? can he not have been crawling? can we not have been crawling? can you not have been crawling? can they not have been crawling?