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