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