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