I can wester you can wester he can wester we can wester you can wester they can wester
V-ing form
I can be westering you can be westering he can be westering we can be westering you can be westering they can be westering
Perfect
I can have westered you can have westered he can have westered we can have westered you can have westered they can have westered
V-ing perfect
I can have been westering you can have been westering he can have been westering we can have been westering you can have been westering they can have been westering
Negation
Simple form
I can't wester you can't wester he can't wester we can't wester you can't wester they can't wester
V-ing form
I can't be westering you can't be westering he can't be westering we can't be westering you can't be westering they can't be westering
Perfect
I can't have westered you can't have westered he can't have westered we can't have westered you can't have westered they can't have westered
V-ing perfect
I can't have been westering you can't have been westering he can't have been westering we can't have been westering you can't have been westering they can't have been westering
Interrogative form
Simple form
can I wester? can you wester? can he wester? can we wester? can you wester? can they wester?
V-ing form
can I be westering? can you be westering? can he be westering? can we be westering? can you be westering? can they be westering?
Perfect
can I have westered? can you have westered? can he have westered? can we have westered? can you have westered? can they have westered?
V-ing perfect
can I have been westering? can you have been westering? can he have been westering? can we have been westering? can you have been westering? can they have been westering?
Interro-negative form
Simple form
can't I wester? can't you wester? can't he wester? can't we wester? can't you wester? can't they wester?
V-ing form
can't I be westering? can't you be westering? can't he be westering? can't we be westering? can't you be westering? can't they be westering?
Perfect
can't I have westered? can't you have westered? can't he have westered? can't we have westered? can't you have westered? can't they have westered?
V-ing perfect
can't I have been westering? can't you have been westering? can't he have been westering? can't we have been westering? can't you have been westering? can't they have been westering?