I can earth you can earth he can earth we can earth you can earth they can earth
V-ing form
I can be earthing you can be earthing he can be earthing we can be earthing you can be earthing they can be earthing
Perfect
I can have earthed you can have earthed he can have earthed we can have earthed you can have earthed they can have earthed
V-ing perfect
I can have been earthing you can have been earthing he can have been earthing we can have been earthing you can have been earthing they can have been earthing
Negation
Simple form
I can't earth you can't earth he can't earth we can't earth you can't earth they can't earth
V-ing form
I can't be earthing you can't be earthing he can't be earthing we can't be earthing you can't be earthing they can't be earthing
Perfect
I can't have earthed you can't have earthed he can't have earthed we can't have earthed you can't have earthed they can't have earthed
V-ing perfect
I can't have been earthing you can't have been earthing he can't have been earthing we can't have been earthing you can't have been earthing they can't have been earthing
Interrogative form
Simple form
can I earth? can you earth? can he earth? can we earth? can you earth? can they earth?
V-ing form
can I be earthing? can you be earthing? can he be earthing? can we be earthing? can you be earthing? can they be earthing?
Perfect
can I have earthed? can you have earthed? can he have earthed? can we have earthed? can you have earthed? can they have earthed?
V-ing perfect
can I have been earthing? can you have been earthing? can he have been earthing? can we have been earthing? can you have been earthing? can they have been earthing?
Interro-negative form
Simple form
can't I earth? can't you earth? can't he earth? can't we earth? can't you earth? can't they earth?
V-ing form
can't I be earthing? can't you be earthing? can't he be earthing? can't we be earthing? can't you be earthing? can't they be earthing?
Perfect
can't I have earthed? can't you have earthed? can't he have earthed? can't we have earthed? can't you have earthed? can't they have earthed?
V-ing perfect
can't I have been earthing? can't you have been earthing? can't he have been earthing? can't we have been earthing? can't you have been earthing? can't they have been earthing?