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