I can isolate you can isolate he can isolate we can isolate you can isolate they can isolate
V-ing form
I can be isolating you can be isolating he can be isolating we can be isolating you can be isolating they can be isolating
Perfect
I can have isolated you can have isolated he can have isolated we can have isolated you can have isolated they can have isolated
V-ing perfect
I can have been isolating you can have been isolating he can have been isolating we can have been isolating you can have been isolating they can have been isolating
Negation
Simple form
I can't isolate you can't isolate he can't isolate we can't isolate you can't isolate they can't isolate
V-ing form
I can't be isolating you can't be isolating he can't be isolating we can't be isolating you can't be isolating they can't be isolating
Perfect
I can't have isolated you can't have isolated he can't have isolated we can't have isolated you can't have isolated they can't have isolated
V-ing perfect
I can't have been isolating you can't have been isolating he can't have been isolating we can't have been isolating you can't have been isolating they can't have been isolating
Interrogative form
Simple form
can I isolate? can you isolate? can he isolate? can we isolate? can you isolate? can they isolate?
V-ing form
can I be isolating? can you be isolating? can he be isolating? can we be isolating? can you be isolating? can they be isolating?
Perfect
can I have isolated? can you have isolated? can he have isolated? can we have isolated? can you have isolated? can they have isolated?
V-ing perfect
can I have been isolating? can you have been isolating? can he have been isolating? can we have been isolating? can you have been isolating? can they have been isolating?
Interro-negative form
Simple form
can't I isolate? can't you isolate? can't he isolate? can't we isolate? can't you isolate? can't they isolate?
V-ing form
can't I be isolating? can't you be isolating? can't he be isolating? can't we be isolating? can't you be isolating? can't they be isolating?
Perfect
can't I have isolated? can't you have isolated? can't he have isolated? can't we have isolated? can't you have isolated? can't they have isolated?
V-ing perfect
can't I have been isolating? can't you have been isolating? can't he have been isolating? can't we have been isolating? can't you have been isolating? can't they have been isolating?