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