English verb conjugation
CAN CRAWL

Regular verb: crawl - crawled - crawled

Affirmation

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

Interrogative form

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