I could troubleshoot you could troubleshoot she could troubleshoot we could troubleshoot you could troubleshoot they could troubleshoot
V-ing form
I could be troubleshooting you could be troubleshooting she could be troubleshooting we could be troubleshooting you could be troubleshooting they could be troubleshooting
Perfect
I could have troubleshot you could have troubleshot she could have troubleshot we could have troubleshot you could have troubleshot they could have troubleshot
V-ing perfect
I could have been troubleshooting you could have been troubleshooting she could have been troubleshooting we could have been troubleshooting you could have been troubleshooting they could have been troubleshooting
Negation
Simple form
I could not troubleshoot you could not troubleshoot she could not troubleshoot we could not troubleshoot you could not troubleshoot they could not troubleshoot
V-ing form
I could not be troubleshooting you could not be troubleshooting she could not be troubleshooting we could not be troubleshooting you could not be troubleshooting they could not be troubleshooting
Perfect
I could not have troubleshot you could not have troubleshot she could not have troubleshot we could not have troubleshot you could not have troubleshot they could not have troubleshot
V-ing perfect
I could not have been troubleshooting you could not have been troubleshooting she could not have been troubleshooting we could not have been troubleshooting you could not have been troubleshooting they could not have been troubleshooting
Interrogative form
Simple form
could I troubleshoot? could you troubleshoot? could she troubleshoot? could we troubleshoot? could you troubleshoot? could they troubleshoot?
V-ing form
could I be troubleshooting? could you be troubleshooting? could she be troubleshooting? could we be troubleshooting? could you be troubleshooting? could they be troubleshooting?
Perfect
could I have troubleshot? could you have troubleshot? could she have troubleshot? could we have troubleshot? could you have troubleshot? could they have troubleshot?
V-ing perfect
could I have been troubleshooting? could you have been troubleshooting? could she have been troubleshooting? could we have been troubleshooting? could you have been troubleshooting? could they have been troubleshooting?
Interro-negative form
Simple form
could I not troubleshoot? could you not troubleshoot? could she not troubleshoot? could we not troubleshoot? could you not troubleshoot? could they not troubleshoot?
V-ing form
could I not be troubleshooting? could you not be troubleshooting? could she not be troubleshooting? could we not be troubleshooting? could you not be troubleshooting? could they not be troubleshooting?
Perfect
could I not have troubleshot? could you not have troubleshot? could she not have troubleshot? could we not have troubleshot? could you not have troubleshot? could they not have troubleshot?
V-ing perfect
could I not have been troubleshooting? could you not have been troubleshooting? could she not have been troubleshooting? could we not have been troubleshooting? could you not have been troubleshooting? could they not have been troubleshooting?