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