English verb conjugation
COULD SHELTER

Regular verb: shelter - sheltered - sheltered

Affirmation

Simple form	V-ing form
I could shelter you could shelter he could shelter we could shelter you could shelter they could shelter	I could be sheltering you could be sheltering he could be sheltering we could be sheltering you could be sheltering they could be sheltering
Perfect	V-ing perfect
I could have sheltered you could have sheltered he could have sheltered we could have sheltered you could have sheltered they could have sheltered	I could have been sheltering you could have been sheltering he could have been sheltering we could have been sheltering you could have been sheltering they could have been sheltering

Negation

Simple form	V-ing form
I couldn't shelter you couldn't shelter he couldn't shelter we couldn't shelter you couldn't shelter they couldn't shelter	I couldn't be sheltering you couldn't be sheltering he couldn't be sheltering we couldn't be sheltering you couldn't be sheltering they couldn't be sheltering
Perfect	V-ing perfect
I couldn't have sheltered you couldn't have sheltered he couldn't have sheltered we couldn't have sheltered you couldn't have sheltered they couldn't have sheltered	I couldn't have been sheltering you couldn't have been sheltering he couldn't have been sheltering we couldn't have been sheltering you couldn't have been sheltering they couldn't have been sheltering

Interrogative form

Simple form	V-ing form
could I shelter? could you shelter? could he shelter? could we shelter? could you shelter? could they shelter?	could I be sheltering? could you be sheltering? could he be sheltering? could we be sheltering? could you be sheltering? could they be sheltering?
Perfect	V-ing perfect
could I have sheltered? could you have sheltered? could he have sheltered? could we have sheltered? could you have sheltered? could they have sheltered?	could I have been sheltering? could you have been sheltering? could he have been sheltering? could we have been sheltering? could you have been sheltering? could they have been sheltering?

Interro-negative form

Simple form	V-ing form
couldn't I shelter? couldn't you shelter? couldn't he shelter? couldn't we shelter? couldn't you shelter? couldn't they shelter?	couldn't I be sheltering? couldn't you be sheltering? couldn't he be sheltering? couldn't we be sheltering? couldn't you be sheltering? couldn't they be sheltering?
Perfect	V-ing perfect
couldn't I have sheltered? couldn't you have sheltered? couldn't he have sheltered? couldn't we have sheltered? couldn't you have sheltered? couldn't they have sheltered?	couldn't I have been sheltering? couldn't you have been sheltering? couldn't he have been sheltering? couldn't we have been sheltering? couldn't you have been sheltering? couldn't they have been sheltering?