I can nest you can nest he can nest we can nest you can nest they can nest
V-ing form
I can be nesting you can be nesting he can be nesting we can be nesting you can be nesting they can be nesting
Perfect
I can have nested you can have nested he can have nested we can have nested you can have nested they can have nested
V-ing perfect
I can have been nesting you can have been nesting he can have been nesting we can have been nesting you can have been nesting they can have been nesting
Negation
Simple form
I can't nest you can't nest he can't nest we can't nest you can't nest they can't nest
V-ing form
I can't be nesting you can't be nesting he can't be nesting we can't be nesting you can't be nesting they can't be nesting
Perfect
I can't have nested you can't have nested he can't have nested we can't have nested you can't have nested they can't have nested
V-ing perfect
I can't have been nesting you can't have been nesting he can't have been nesting we can't have been nesting you can't have been nesting they can't have been nesting
Interrogative form
Simple form
can I nest? can you nest? can he nest? can we nest? can you nest? can they nest?
V-ing form
can I be nesting? can you be nesting? can he be nesting? can we be nesting? can you be nesting? can they be nesting?
Perfect
can I have nested? can you have nested? can he have nested? can we have nested? can you have nested? can they have nested?
V-ing perfect
can I have been nesting? can you have been nesting? can he have been nesting? can we have been nesting? can you have been nesting? can they have been nesting?
Interro-negative form
Simple form
can't I nest? can't you nest? can't he nest? can't we nest? can't you nest? can't they nest?
V-ing form
can't I be nesting? can't you be nesting? can't he be nesting? can't we be nesting? can't you be nesting? can't they be nesting?
Perfect
can't I have nested? can't you have nested? can't he have nested? can't we have nested? can't you have nested? can't they have nested?
V-ing perfect
can't I have been nesting? can't you have been nesting? can't he have been nesting? can't we have been nesting? can't you have been nesting? can't they have been nesting?