I can roadblock you can roadblock he can roadblock we can roadblock you can roadblock they can roadblock
V-ing form
I can be roadblocking you can be roadblocking he can be roadblocking we can be roadblocking you can be roadblocking they can be roadblocking
Perfect
I can have roadblocked you can have roadblocked he can have roadblocked we can have roadblocked you can have roadblocked they can have roadblocked
V-ing perfect
I can have been roadblocking you can have been roadblocking he can have been roadblocking we can have been roadblocking you can have been roadblocking they can have been roadblocking
Negation
Simple form
I can't roadblock you can't roadblock he can't roadblock we can't roadblock you can't roadblock they can't roadblock
V-ing form
I can't be roadblocking you can't be roadblocking he can't be roadblocking we can't be roadblocking you can't be roadblocking they can't be roadblocking
Perfect
I can't have roadblocked you can't have roadblocked he can't have roadblocked we can't have roadblocked you can't have roadblocked they can't have roadblocked
V-ing perfect
I can't have been roadblocking you can't have been roadblocking he can't have been roadblocking we can't have been roadblocking you can't have been roadblocking they can't have been roadblocking
Interrogative form
Simple form
can I roadblock? can you roadblock? can he roadblock? can we roadblock? can you roadblock? can they roadblock?
V-ing form
can I be roadblocking? can you be roadblocking? can he be roadblocking? can we be roadblocking? can you be roadblocking? can they be roadblocking?
Perfect
can I have roadblocked? can you have roadblocked? can he have roadblocked? can we have roadblocked? can you have roadblocked? can they have roadblocked?
V-ing perfect
can I have been roadblocking? can you have been roadblocking? can he have been roadblocking? can we have been roadblocking? can you have been roadblocking? can they have been roadblocking?
Interro-negative form
Simple form
can't I roadblock? can't you roadblock? can't he roadblock? can't we roadblock? can't you roadblock? can't they roadblock?
V-ing form
can't I be roadblocking? can't you be roadblocking? can't he be roadblocking? can't we be roadblocking? can't you be roadblocking? can't they be roadblocking?
Perfect
can't I have roadblocked? can't you have roadblocked? can't he have roadblocked? can't we have roadblocked? can't you have roadblocked? can't they have roadblocked?
V-ing perfect
can't I have been roadblocking? can't you have been roadblocking? can't he have been roadblocking? can't we have been roadblocking? can't you have been roadblocking? can't they have been roadblocking?