English verb conjugation
COULD APPRECIATE

Regular verb: appreciate - appreciated - appreciated

Affirmation

Simple form	V-ing form
I could appreciate you could appreciate he could appreciate we could appreciate you could appreciate they could appreciate	I could be appreciating you could be appreciating he could be appreciating we could be appreciating you could be appreciating they could be appreciating
Perfect	V-ing perfect
I could have appreciated you could have appreciated he could have appreciated we could have appreciated you could have appreciated they could have appreciated	I could have been appreciating you could have been appreciating he could have been appreciating we could have been appreciating you could have been appreciating they could have been appreciating

Negation

Simple form	V-ing form
I couldn't appreciate you couldn't appreciate he couldn't appreciate we couldn't appreciate you couldn't appreciate they couldn't appreciate	I couldn't be appreciating you couldn't be appreciating he couldn't be appreciating we couldn't be appreciating you couldn't be appreciating they couldn't be appreciating
Perfect	V-ing perfect
I couldn't have appreciated you couldn't have appreciated he couldn't have appreciated we couldn't have appreciated you couldn't have appreciated they couldn't have appreciated	I couldn't have been appreciating you couldn't have been appreciating he couldn't have been appreciating we couldn't have been appreciating you couldn't have been appreciating they couldn't have been appreciating

Interrogative form

Simple form	V-ing form
could I appreciate? could you appreciate? could he appreciate? could we appreciate? could you appreciate? could they appreciate?	could I be appreciating? could you be appreciating? could he be appreciating? could we be appreciating? could you be appreciating? could they be appreciating?
Perfect	V-ing perfect
could I have appreciated? could you have appreciated? could he have appreciated? could we have appreciated? could you have appreciated? could they have appreciated?	could I have been appreciating? could you have been appreciating? could he have been appreciating? could we have been appreciating? could you have been appreciating? could they have been appreciating?

Interro-negative form

Simple form	V-ing form
couldn't I appreciate? couldn't you appreciate? couldn't he appreciate? couldn't we appreciate? couldn't you appreciate? couldn't they appreciate?	couldn't I be appreciating? couldn't you be appreciating? couldn't he be appreciating? couldn't we be appreciating? couldn't you be appreciating? couldn't they be appreciating?
Perfect	V-ing perfect
couldn't I have appreciated? couldn't you have appreciated? couldn't he have appreciated? couldn't we have appreciated? couldn't you have appreciated? couldn't they have appreciated?	couldn't I have been appreciating? couldn't you have been appreciating? couldn't he have been appreciating? couldn't we have been appreciating? couldn't you have been appreciating? couldn't they have been appreciating?