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