English verb conjugation
COULD NAVIGATE

Regular verb: navigate - navigated - navigated

Affirmation

Simple form	V-ing form
I could navigate you could navigate she could navigate we could navigate you could navigate they could navigate	I could be navigating you could be navigating she could be navigating we could be navigating you could be navigating they could be navigating
Perfect	V-ing perfect
I could have navigated you could have navigated she could have navigated we could have navigated you could have navigated they could have navigated	I could have been navigating you could have been navigating she could have been navigating we could have been navigating you could have been navigating they could have been navigating

Negation

Simple form	V-ing form
I couldn't navigate you couldn't navigate she couldn't navigate we couldn't navigate you couldn't navigate they couldn't navigate	I couldn't be navigating you couldn't be navigating she couldn't be navigating we couldn't be navigating you couldn't be navigating they couldn't be navigating
Perfect	V-ing perfect
I couldn't have navigated you couldn't have navigated she couldn't have navigated we couldn't have navigated you couldn't have navigated they couldn't have navigated	I couldn't have been navigating you couldn't have been navigating she couldn't have been navigating we couldn't have been navigating you couldn't have been navigating they couldn't have been navigating

Interrogative form

Simple form	V-ing form
could I navigate? could you navigate? could she navigate? could we navigate? could you navigate? could they navigate?	could I be navigating? could you be navigating? could she be navigating? could we be navigating? could you be navigating? could they be navigating?
Perfect	V-ing perfect
could I have navigated? could you have navigated? could she have navigated? could we have navigated? could you have navigated? could they have navigated?	could I have been navigating? could you have been navigating? could she have been navigating? could we have been navigating? could you have been navigating? could they have been navigating?

Interro-negative form

Simple form	V-ing form
couldn't I navigate? couldn't you navigate? couldn't she navigate? couldn't we navigate? couldn't you navigate? couldn't they navigate?	couldn't I be navigating? couldn't you be navigating? couldn't she be navigating? couldn't we be navigating? couldn't you be navigating? couldn't they be navigating?
Perfect	V-ing perfect
couldn't I have navigated? couldn't you have navigated? couldn't she have navigated? couldn't we have navigated? couldn't you have navigated? couldn't they have navigated?	couldn't I have been navigating? couldn't you have been navigating? couldn't she have been navigating? couldn't we have been navigating? couldn't you have been navigating? couldn't they have been navigating?