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