could earth
Regular verb: earth - earthed- earthed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could earth
you could earth
she could earth
we could earth
you could earth
they could earth 	I could be earthing
you could be earthing
she could be earthing
we could be earthing
you could be earthing
they could be earthing	I could have earthed
you could have earthed
she could have earthed
we could have earthed
you could have earthed
they could have earthed	I could have been earthing
you could have been earthing
she could have been earthing
we could have been earthing
you could have been earthing
they could have been earthing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't earth
you couldn't earth
she couldn't earth
we couldn't earth
you couldn't earth
they couldn't earth 	I couldn't be earthing
you couldn't be earthing
she couldn't be earthing
we couldn't be earthing
you couldn't be earthing
they couldn't be earthing	I couldn't have earthed
you couldn't have earthed
she couldn't have earthed
we couldn't have earthed
you couldn't have earthed
they couldn't have earthed	I couldn't have been earthing
you couldn't have been earthing
she couldn't have been earthing
we couldn't have been earthing
you couldn't have been earthing
they couldn't have been earthing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I earth?
could you earth?
could she earth?
could we earth?
could you earth?
could they earth? 	could I be earthing?
could you be earthing?
could she be earthing?
could we be earthing?
could you be earthing?
could they be earthing? 	could I have earthed?
could you have earthed?
could she have earthed?
could we have earthed?
could you have earthed?
could they have earthed? 	could I have been earthing?
could you have been earthing?
could she have been earthing?
could we have been earthing?
could you have been earthing?
could they have been earthing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I earth?
couldn't you earth?
couldn't she earth?
couldn't we earth?
couldn't you earth?
couldn't they earth? 	couldn't I be earthing?
couldn't you be earthing?
couldn't she be earthing?
couldn't we be earthing?
couldn't you be earthing?
couldn't they be earthing? 	couldn't I have earthed?
couldn't you have earthed?
couldn't she have earthed?
couldn't we have earthed?
couldn't you have earthed?
couldn't they have earthed? 	couldn't I have been earthing?
couldn't you have been earthing?
couldn't she have been earthing?
couldn't we have been earthing?
couldn't you have been earthing?
couldn't they have been earthing?