English verb conjugation
COULD QUEUE

Regular verb: queue - queued - queued

Affirmation

Simple form	V-ing form
I could queue you could queue he could queue we could queue you could queue they could queue	I could be queuing you could be queuing he could be queuing we could be queuing you could be queuing they could be queuing
Perfect	V-ing perfect
I could have queued you could have queued he could have queued we could have queued you could have queued they could have queued	I could have been queuing you could have been queuing he could have been queuing we could have been queuing you could have been queuing they could have been queuing

Negation

Simple form	V-ing form
I couldn't queue you couldn't queue he couldn't queue we couldn't queue you couldn't queue they couldn't queue	I couldn't be queuing you couldn't be queuing he couldn't be queuing we couldn't be queuing you couldn't be queuing they couldn't be queuing
Perfect	V-ing perfect
I couldn't have queued you couldn't have queued he couldn't have queued we couldn't have queued you couldn't have queued they couldn't have queued	I couldn't have been queuing you couldn't have been queuing he couldn't have been queuing we couldn't have been queuing you couldn't have been queuing they couldn't have been queuing

Interrogative form

Simple form	V-ing form
could I queue? could you queue? could he queue? could we queue? could you queue? could they queue?	could I be queuing? could you be queuing? could he be queuing? could we be queuing? could you be queuing? could they be queuing?
Perfect	V-ing perfect
could I have queued? could you have queued? could he have queued? could we have queued? could you have queued? could they have queued?	could I have been queuing? could you have been queuing? could he have been queuing? could we have been queuing? could you have been queuing? could they have been queuing?

Interro-negative form

Simple form	V-ing form
couldn't I queue? couldn't you queue? couldn't he queue? couldn't we queue? couldn't you queue? couldn't they queue?	couldn't I be queuing? couldn't you be queuing? couldn't he be queuing? couldn't we be queuing? couldn't you be queuing? couldn't they be queuing?
Perfect	V-ing perfect
couldn't I have queued? couldn't you have queued? couldn't he have queued? couldn't we have queued? couldn't you have queued? couldn't they have queued?	couldn't I have been queuing? couldn't you have been queuing? couldn't he have been queuing? couldn't we have been queuing? couldn't you have been queuing? couldn't they have been queuing?