I could garter you could garter she could garter we could garter you could garter they could garter
V-ing form
I could be gartering you could be gartering she could be gartering we could be gartering you could be gartering they could be gartering
Perfect
I could have gartered you could have gartered she could have gartered we could have gartered you could have gartered they could have gartered
V-ing perfect
I could have been gartering you could have been gartering she could have been gartering we could have been gartering you could have been gartering they could have been gartering
Negation
Simple form
I could not garter you could not garter she could not garter we could not garter you could not garter they could not garter
V-ing form
I could not be gartering you could not be gartering she could not be gartering we could not be gartering you could not be gartering they could not be gartering
Perfect
I could not have gartered you could not have gartered she could not have gartered we could not have gartered you could not have gartered they could not have gartered
V-ing perfect
I could not have been gartering you could not have been gartering she could not have been gartering we could not have been gartering you could not have been gartering they could not have been gartering
Interrogative form
Simple form
could I garter? could you garter? could she garter? could we garter? could you garter? could they garter?
V-ing form
could I be gartering? could you be gartering? could she be gartering? could we be gartering? could you be gartering? could they be gartering?
Perfect
could I have gartered? could you have gartered? could she have gartered? could we have gartered? could you have gartered? could they have gartered?
V-ing perfect
could I have been gartering? could you have been gartering? could she have been gartering? could we have been gartering? could you have been gartering? could they have been gartering?
Interro-negative form
Simple form
could I not garter? could you not garter? could she not garter? could we not garter? could you not garter? could they not garter?
V-ing form
could I not be gartering? could you not be gartering? could she not be gartering? could we not be gartering? could you not be gartering? could they not be gartering?
Perfect
could I not have gartered? could you not have gartered? could she not have gartered? could we not have gartered? could you not have gartered? could they not have gartered?
V-ing perfect
could I not have been gartering? could you not have been gartering? could she not have been gartering? could we not have been gartering? could you not have been gartering? could they not have been gartering?