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