I can navigate you can navigate he can navigate we can navigate you can navigate they can navigate
V-ing form
I can be navigating you can be navigating he can be navigating we can be navigating you can be navigating they can be navigating
Perfect
I can have navigated you can have navigated he can have navigated we can have navigated you can have navigated they can have navigated
V-ing perfect
I can have been navigating you can have been navigating he can have been navigating we can have been navigating you can have been navigating they can have been navigating
Negation
Simple form
I can't navigate you can't navigate he can't navigate we can't navigate you can't navigate they can't navigate
V-ing form
I can't be navigating you can't be navigating he can't be navigating we can't be navigating you can't be navigating they can't be navigating
Perfect
I can't have navigated you can't have navigated he can't have navigated we can't have navigated you can't have navigated they can't have navigated
V-ing perfect
I can't have been navigating you can't have been navigating he can't have been navigating we can't have been navigating you can't have been navigating they can't have been navigating
Interrogative form
Simple form
can I navigate? can you navigate? can he navigate? can we navigate? can you navigate? can they navigate?
V-ing form
can I be navigating? can you be navigating? can he be navigating? can we be navigating? can you be navigating? can they be navigating?
Perfect
can I have navigated? can you have navigated? can he have navigated? can we have navigated? can you have navigated? can they have navigated?
V-ing perfect
can I have been navigating? can you have been navigating? can he have been navigating? can we have been navigating? can you have been navigating? can they have been navigating?
Interro-negative form
Simple form
can't I navigate? can't you navigate? can't he navigate? can't we navigate? can't you navigate? can't they navigate?
V-ing form
can't I be navigating? can't you be navigating? can't he be navigating? can't we be navigating? can't you be navigating? can't they be navigating?
Perfect
can't I have navigated? can't you have navigated? can't he have navigated? can't we have navigated? can't you have navigated? can't they have navigated?
V-ing perfect
can't I have been navigating? can't you have been navigating? can't he have been navigating? can't we have been navigating? can't you have been navigating? can't they have been navigating?