could greet
Regular verb: greet - greeted- greeted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could greet
you could greet
he could greet
we could greet
you could greet
they could greet 	I could be greeting
you could be greeting
he could be greeting
we could be greeting
you could be greeting
they could be greeting	I could have greeted
you could have greeted
he could have greeted
we could have greeted
you could have greeted
they could have greeted	I could have been greeting
you could have been greeting
he could have been greeting
we could have been greeting
you could have been greeting
they could have been greeting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't greet
you couldn't greet
he couldn't greet
we couldn't greet
you couldn't greet
they couldn't greet 	I couldn't be greeting
you couldn't be greeting
he couldn't be greeting
we couldn't be greeting
you couldn't be greeting
they couldn't be greeting	I couldn't have greeted
you couldn't have greeted
he couldn't have greeted
we couldn't have greeted
you couldn't have greeted
they couldn't have greeted	I couldn't have been greeting
you couldn't have been greeting
he couldn't have been greeting
we couldn't have been greeting
you couldn't have been greeting
they couldn't have been greeting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I greet?
could you greet?
could he greet?
could we greet?
could you greet?
could they greet? 	could I be greeting?
could you be greeting?
could he be greeting?
could we be greeting?
could you be greeting?
could they be greeting? 	could I have greeted?
could you have greeted?
could he have greeted?
could we have greeted?
could you have greeted?
could they have greeted? 	could I have been greeting?
could you have been greeting?
could he have been greeting?
could we have been greeting?
could you have been greeting?
could they have been greeting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I greet?
couldn't you greet?
couldn't he greet?
couldn't we greet?
couldn't you greet?
couldn't they greet? 	couldn't I be greeting?
couldn't you be greeting?
couldn't he be greeting?
couldn't we be greeting?
couldn't you be greeting?
couldn't they be greeting? 	couldn't I have greeted?
couldn't you have greeted?
couldn't he have greeted?
couldn't we have greeted?
couldn't you have greeted?
couldn't they have greeted? 	couldn't I have been greeting?
couldn't you have been greeting?
couldn't he have been greeting?
couldn't we have been greeting?
couldn't you have been greeting?
couldn't they have been greeting?