English verb conjugation
COULD TRAVEL

Regular verb: travel - travelled - travelled

Affirmation

Simple form	V-ing form
I could travel you could travel he could travel we could travel you could travel they could travel	I could be travelling you could be travelling he could be travelling we could be travelling you could be travelling they could be travelling
Perfect	V-ing perfect
I could have travelled you could have travelled he could have travelled we could have travelled you could have travelled they could have travelled	I could have been travelling you could have been travelling he could have been travelling we could have been travelling you could have been travelling they could have been travelling

Negation

Simple form	V-ing form
I couldn't travel you couldn't travel he couldn't travel we couldn't travel you couldn't travel they couldn't travel	I couldn't be travelling you couldn't be travelling he couldn't be travelling we couldn't be travelling you couldn't be travelling they couldn't be travelling
Perfect	V-ing perfect
I couldn't have travelled you couldn't have travelled he couldn't have travelled we couldn't have travelled you couldn't have travelled they couldn't have travelled	I couldn't have been travelling you couldn't have been travelling he couldn't have been travelling we couldn't have been travelling you couldn't have been travelling they couldn't have been travelling

Interrogative form

Simple form	V-ing form
could I travel? could you travel? could he travel? could we travel? could you travel? could they travel?	could I be travelling? could you be travelling? could he be travelling? could we be travelling? could you be travelling? could they be travelling?
Perfect	V-ing perfect
could I have travelled? could you have travelled? could he have travelled? could we have travelled? could you have travelled? could they have travelled?	could I have been travelling? could you have been travelling? could he have been travelling? could we have been travelling? could you have been travelling? could they have been travelling?

Interro-negative form

Simple form	V-ing form
couldn't I travel? couldn't you travel? couldn't he travel? couldn't we travel? couldn't you travel? couldn't they travel?	couldn't I be travelling? couldn't you be travelling? couldn't he be travelling? couldn't we be travelling? couldn't you be travelling? couldn't they be travelling?
Perfect	V-ing perfect
couldn't I have travelled? couldn't you have travelled? couldn't he have travelled? couldn't we have travelled? couldn't you have travelled? couldn't they have travelled?	couldn't I have been travelling? couldn't you have been travelling? couldn't he have been travelling? couldn't we have been travelling? couldn't you have been travelling? couldn't they have been travelling?