could attaint
Regular verb: attaint - attainted- attainted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could attaint
you could attaint
he could attaint
we could attaint
you could attaint
they could attaint 	I could be attainting
you could be attainting
he could be attainting
we could be attainting
you could be attainting
they could be attainting	I could have attainted
you could have attainted
he could have attainted
we could have attainted
you could have attainted
they could have attainted	I could have been attainting
you could have been attainting
he could have been attainting
we could have been attainting
you could have been attainting
they could have been attainting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't attaint
you couldn't attaint
he couldn't attaint
we couldn't attaint
you couldn't attaint
they couldn't attaint 	I couldn't be attainting
you couldn't be attainting
he couldn't be attainting
we couldn't be attainting
you couldn't be attainting
they couldn't be attainting	I couldn't have attainted
you couldn't have attainted
he couldn't have attainted
we couldn't have attainted
you couldn't have attainted
they couldn't have attainted	I couldn't have been attainting
you couldn't have been attainting
he couldn't have been attainting
we couldn't have been attainting
you couldn't have been attainting
they couldn't have been attainting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I attaint?
could you attaint?
could he attaint?
could we attaint?
could you attaint?
could they attaint? 	could I be attainting?
could you be attainting?
could he be attainting?
could we be attainting?
could you be attainting?
could they be attainting? 	could I have attainted?
could you have attainted?
could he have attainted?
could we have attainted?
could you have attainted?
could they have attainted? 	could I have been attainting?
could you have been attainting?
could he have been attainting?
could we have been attainting?
could you have been attainting?
could they have been attainting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I attaint?
couldn't you attaint?
couldn't he attaint?
couldn't we attaint?
couldn't you attaint?
couldn't they attaint? 	couldn't I be attainting?
couldn't you be attainting?
couldn't he be attainting?
couldn't we be attainting?
couldn't you be attainting?
couldn't they be attainting? 	couldn't I have attainted?
couldn't you have attainted?
couldn't he have attainted?
couldn't we have attainted?
couldn't you have attainted?
couldn't they have attainted? 	couldn't I have been attainting?
couldn't you have been attainting?
couldn't he have been attainting?
couldn't we have been attainting?
couldn't you have been attainting?
couldn't they have been attainting?