I can picket you can picket he can picket we can picket you can picket they can picket
V-ing form
I can be picketing you can be picketing he can be picketing we can be picketing you can be picketing they can be picketing
Perfect
I can have picketed you can have picketed he can have picketed we can have picketed you can have picketed they can have picketed
V-ing perfect
I can have been picketing you can have been picketing he can have been picketing we can have been picketing you can have been picketing they can have been picketing
Negation
Simple form
I can't picket you can't picket he can't picket we can't picket you can't picket they can't picket
V-ing form
I can't be picketing you can't be picketing he can't be picketing we can't be picketing you can't be picketing they can't be picketing
Perfect
I can't have picketed you can't have picketed he can't have picketed we can't have picketed you can't have picketed they can't have picketed
V-ing perfect
I can't have been picketing you can't have been picketing he can't have been picketing we can't have been picketing you can't have been picketing they can't have been picketing
Interrogative form
Simple form
can I picket? can you picket? can he picket? can we picket? can you picket? can they picket?
V-ing form
can I be picketing? can you be picketing? can he be picketing? can we be picketing? can you be picketing? can they be picketing?
Perfect
can I have picketed? can you have picketed? can he have picketed? can we have picketed? can you have picketed? can they have picketed?
V-ing perfect
can I have been picketing? can you have been picketing? can he have been picketing? can we have been picketing? can you have been picketing? can they have been picketing?
Interro-negative form
Simple form
can't I picket? can't you picket? can't he picket? can't we picket? can't you picket? can't they picket?
V-ing form
can't I be picketing? can't you be picketing? can't he be picketing? can't we be picketing? can't you be picketing? can't they be picketing?
Perfect
can't I have picketed? can't you have picketed? can't he have picketed? can't we have picketed? can't you have picketed? can't they have picketed?
V-ing perfect
can't I have been picketing? can't you have been picketing? can't he have been picketing? can't we have been picketing? can't you have been picketing? can't they have been picketing?