English verb conjugation
COULD SUNDOWN

Regular verb: sundown - sundowned - sundowned

Affirmation

Simple form	V-ing form
I could sundown you could sundown she could sundown we could sundown you could sundown they could sundown	I could be sundowning you could be sundowning she could be sundowning we could be sundowning you could be sundowning they could be sundowning
Perfect	V-ing perfect
I could have sundowned you could have sundowned she could have sundowned we could have sundowned you could have sundowned they could have sundowned	I could have been sundowning you could have been sundowning she could have been sundowning we could have been sundowning you could have been sundowning they could have been sundowning

Negation

Simple form	V-ing form
I couldn't sundown you couldn't sundown she couldn't sundown we couldn't sundown you couldn't sundown they couldn't sundown	I couldn't be sundowning you couldn't be sundowning she couldn't be sundowning we couldn't be sundowning you couldn't be sundowning they couldn't be sundowning
Perfect	V-ing perfect
I couldn't have sundowned you couldn't have sundowned she couldn't have sundowned we couldn't have sundowned you couldn't have sundowned they couldn't have sundowned	I couldn't have been sundowning you couldn't have been sundowning she couldn't have been sundowning we couldn't have been sundowning you couldn't have been sundowning they couldn't have been sundowning

Interrogative form

Simple form	V-ing form
could I sundown? could you sundown? could she sundown? could we sundown? could you sundown? could they sundown?	could I be sundowning? could you be sundowning? could she be sundowning? could we be sundowning? could you be sundowning? could they be sundowning?
Perfect	V-ing perfect
could I have sundowned? could you have sundowned? could she have sundowned? could we have sundowned? could you have sundowned? could they have sundowned?	could I have been sundowning? could you have been sundowning? could she have been sundowning? could we have been sundowning? could you have been sundowning? could they have been sundowning?

Interro-negative form

Simple form	V-ing form
couldn't I sundown? couldn't you sundown? couldn't she sundown? couldn't we sundown? couldn't you sundown? couldn't they sundown?	couldn't I be sundowning? couldn't you be sundowning? couldn't she be sundowning? couldn't we be sundowning? couldn't you be sundowning? couldn't they be sundowning?
Perfect	V-ing perfect
couldn't I have sundowned? couldn't you have sundowned? couldn't she have sundowned? couldn't we have sundowned? couldn't you have sundowned? couldn't they have sundowned?	couldn't I have been sundowning? couldn't you have been sundowning? couldn't she have been sundowning? couldn't we have been sundowning? couldn't you have been sundowning? couldn't they have been sundowning?