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