I can ballast you can ballast he can ballast we can ballast you can ballast they can ballast
V-ing form
I can be ballasting you can be ballasting he can be ballasting we can be ballasting you can be ballasting they can be ballasting
Perfect
I can have ballasted you can have ballasted he can have ballasted we can have ballasted you can have ballasted they can have ballasted
V-ing perfect
I can have been ballasting you can have been ballasting he can have been ballasting we can have been ballasting you can have been ballasting they can have been ballasting
Negation
Simple form
I cannot ballast you cannot ballast he cannot ballast we cannot ballast you cannot ballast they cannot ballast
V-ing form
I cannot be ballasting you cannot be ballasting he cannot be ballasting we cannot be ballasting you cannot be ballasting they cannot be ballasting
Perfect
I cannot have ballasted you cannot have ballasted he cannot have ballasted we cannot have ballasted you cannot have ballasted they cannot have ballasted
V-ing perfect
I cannot have been ballasting you cannot have been ballasting he cannot have been ballasting we cannot have been ballasting you cannot have been ballasting they cannot have been ballasting
Interrogative form
Simple form
can I ballast? can you ballast? can he ballast? can we ballast? can you ballast? can they ballast?
V-ing form
can I be ballasting? can you be ballasting? can he be ballasting? can we be ballasting? can you be ballasting? can they be ballasting?
Perfect
can I have ballasted? can you have ballasted? can he have ballasted? can we have ballasted? can you have ballasted? can they have ballasted?
V-ing perfect
can I have been ballasting? can you have been ballasting? can he have been ballasting? can we have been ballasting? can you have been ballasting? can they have been ballasting?
Interro-negative form
Simple form
can I not ballast? can you not ballast? can he not ballast? can we not ballast? can you not ballast? can they not ballast?
V-ing form
can I not be ballasting? can you not be ballasting? can he not be ballasting? can we not be ballasting? can you not be ballasting? can they not be ballasting?
Perfect
can I not have ballasted? can you not have ballasted? can he not have ballasted? can we not have ballasted? can you not have ballasted? can they not have ballasted?
V-ing perfect
can I not have been ballasting? can you not have been ballasting? can he not have been ballasting? can we not have been ballasting? can you not have been ballasting? can they not have been ballasting?