I could extravagate you could extravagate he could extravagate we could extravagate you could extravagate they could extravagate
V-ing form
I could be extravagating you could be extravagating he could be extravagating we could be extravagating you could be extravagating they could be extravagating
Perfect
I could have extravagated you could have extravagated he could have extravagated we could have extravagated you could have extravagated they could have extravagated
V-ing perfect
I could have been extravagating you could have been extravagating he could have been extravagating we could have been extravagating you could have been extravagating they could have been extravagating
Negation
Simple form
I couldn't extravagate you couldn't extravagate he couldn't extravagate we couldn't extravagate you couldn't extravagate they couldn't extravagate
V-ing form
I couldn't be extravagating you couldn't be extravagating he couldn't be extravagating we couldn't be extravagating you couldn't be extravagating they couldn't be extravagating
Perfect
I couldn't have extravagated you couldn't have extravagated he couldn't have extravagated we couldn't have extravagated you couldn't have extravagated they couldn't have extravagated
V-ing perfect
I couldn't have been extravagating you couldn't have been extravagating he couldn't have been extravagating we couldn't have been extravagating you couldn't have been extravagating they couldn't have been extravagating
Interrogative form
Simple form
could I extravagate? could you extravagate? could he extravagate? could we extravagate? could you extravagate? could they extravagate?
V-ing form
could I be extravagating? could you be extravagating? could he be extravagating? could we be extravagating? could you be extravagating? could they be extravagating?
Perfect
could I have extravagated? could you have extravagated? could he have extravagated? could we have extravagated? could you have extravagated? could they have extravagated?
V-ing perfect
could I have been extravagating? could you have been extravagating? could he have been extravagating? could we have been extravagating? could you have been extravagating? could they have been extravagating?
Interro-negative form
Simple form
couldn't I extravagate? couldn't you extravagate? couldn't he extravagate? couldn't we extravagate? couldn't you extravagate? couldn't they extravagate?
V-ing form
couldn't I be extravagating? couldn't you be extravagating? couldn't he be extravagating? couldn't we be extravagating? couldn't you be extravagating? couldn't they be extravagating?
Perfect
couldn't I have extravagated? couldn't you have extravagated? couldn't he have extravagated? couldn't we have extravagated? couldn't you have extravagated? couldn't they have extravagated?
V-ing perfect
couldn't I have been extravagating? couldn't you have been extravagating? couldn't he have been extravagating? couldn't we have been extravagating? couldn't you have been extravagating? couldn't they have been extravagating?