I could disinfect you could disinfect she could disinfect we could disinfect you could disinfect they could disinfect
V-ing form
I could be disinfecting you could be disinfecting she could be disinfecting we could be disinfecting you could be disinfecting they could be disinfecting
Perfect
I could have disinfected you could have disinfected she could have disinfected we could have disinfected you could have disinfected they could have disinfected
V-ing perfect
I could have been disinfecting you could have been disinfecting she could have been disinfecting we could have been disinfecting you could have been disinfecting they could have been disinfecting
Negation
Simple form
I couldn't disinfect you couldn't disinfect she couldn't disinfect we couldn't disinfect you couldn't disinfect they couldn't disinfect
V-ing form
I couldn't be disinfecting you couldn't be disinfecting she couldn't be disinfecting we couldn't be disinfecting you couldn't be disinfecting they couldn't be disinfecting
Perfect
I couldn't have disinfected you couldn't have disinfected she couldn't have disinfected we couldn't have disinfected you couldn't have disinfected they couldn't have disinfected
V-ing perfect
I couldn't have been disinfecting you couldn't have been disinfecting she couldn't have been disinfecting we couldn't have been disinfecting you couldn't have been disinfecting they couldn't have been disinfecting
Interrogative form
Simple form
could I disinfect? could you disinfect? could she disinfect? could we disinfect? could you disinfect? could they disinfect?
V-ing form
could I be disinfecting? could you be disinfecting? could she be disinfecting? could we be disinfecting? could you be disinfecting? could they be disinfecting?
Perfect
could I have disinfected? could you have disinfected? could she have disinfected? could we have disinfected? could you have disinfected? could they have disinfected?
V-ing perfect
could I have been disinfecting? could you have been disinfecting? could she have been disinfecting? could we have been disinfecting? could you have been disinfecting? could they have been disinfecting?
Interro-negative form
Simple form
couldn't I disinfect? couldn't you disinfect? couldn't she disinfect? couldn't we disinfect? couldn't you disinfect? couldn't they disinfect?
V-ing form
couldn't I be disinfecting? couldn't you be disinfecting? couldn't she be disinfecting? couldn't we be disinfecting? couldn't you be disinfecting? couldn't they be disinfecting?
Perfect
couldn't I have disinfected? couldn't you have disinfected? couldn't she have disinfected? couldn't we have disinfected? couldn't you have disinfected? couldn't they have disinfected?
V-ing perfect
couldn't I have been disinfecting? couldn't you have been disinfecting? couldn't she have been disinfecting? couldn't we have been disinfecting? couldn't you have been disinfecting? couldn't they have been disinfecting?