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