I can shelter you can shelter he can shelter we can shelter you can shelter they can shelter
V-ing form
I can be sheltering you can be sheltering he can be sheltering we can be sheltering you can be sheltering they can be sheltering
Perfect
I can have sheltered you can have sheltered he can have sheltered we can have sheltered you can have sheltered they can have sheltered
V-ing perfect
I can have been sheltering you can have been sheltering he can have been sheltering we can have been sheltering you can have been sheltering they can have been sheltering
Negation
Simple form
I can't shelter you can't shelter he can't shelter we can't shelter you can't shelter they can't shelter
V-ing form
I can't be sheltering you can't be sheltering he can't be sheltering we can't be sheltering you can't be sheltering they can't be sheltering
Perfect
I can't have sheltered you can't have sheltered he can't have sheltered we can't have sheltered you can't have sheltered they can't have sheltered
V-ing perfect
I can't have been sheltering you can't have been sheltering he can't have been sheltering we can't have been sheltering you can't have been sheltering they can't have been sheltering
Interrogative form
Simple form
can I shelter? can you shelter? can he shelter? can we shelter? can you shelter? can they shelter?
V-ing form
can I be sheltering? can you be sheltering? can he be sheltering? can we be sheltering? can you be sheltering? can they be sheltering?
Perfect
can I have sheltered? can you have sheltered? can he have sheltered? can we have sheltered? can you have sheltered? can they have sheltered?
V-ing perfect
can I have been sheltering? can you have been sheltering? can he have been sheltering? can we have been sheltering? can you have been sheltering? can they have been sheltering?
Interro-negative form
Simple form
can't I shelter? can't you shelter? can't he shelter? can't we shelter? can't you shelter? can't they shelter?
V-ing form
can't I be sheltering? can't you be sheltering? can't he be sheltering? can't we be sheltering? can't you be sheltering? can't they be sheltering?
Perfect
can't I have sheltered? can't you have sheltered? can't he have sheltered? can't we have sheltered? can't you have sheltered? can't they have sheltered?
V-ing perfect
can't I have been sheltering? can't you have been sheltering? can't he have been sheltering? can't we have been sheltering? can't you have been sheltering? can't they have been sheltering?