I can joust you can joust he can joust we can joust you can joust they can joust
V-ing form
I can be jousting you can be jousting he can be jousting we can be jousting you can be jousting they can be jousting
Perfect
I can have jousted you can have jousted he can have jousted we can have jousted you can have jousted they can have jousted
V-ing perfect
I can have been jousting you can have been jousting he can have been jousting we can have been jousting you can have been jousting they can have been jousting
Negation
Simple form
I cannot joust you cannot joust he cannot joust we cannot joust you cannot joust they cannot joust
V-ing form
I cannot be jousting you cannot be jousting he cannot be jousting we cannot be jousting you cannot be jousting they cannot be jousting
Perfect
I cannot have jousted you cannot have jousted he cannot have jousted we cannot have jousted you cannot have jousted they cannot have jousted
V-ing perfect
I cannot have been jousting you cannot have been jousting he cannot have been jousting we cannot have been jousting you cannot have been jousting they cannot have been jousting
Interrogative form
Simple form
can I joust? can you joust? can he joust? can we joust? can you joust? can they joust?
V-ing form
can I be jousting? can you be jousting? can he be jousting? can we be jousting? can you be jousting? can they be jousting?
Perfect
can I have jousted? can you have jousted? can he have jousted? can we have jousted? can you have jousted? can they have jousted?
V-ing perfect
can I have been jousting? can you have been jousting? can he have been jousting? can we have been jousting? can you have been jousting? can they have been jousting?
Interro-negative form
Simple form
can I not joust? can you not joust? can he not joust? can we not joust? can you not joust? can they not joust?
V-ing form
can I not be jousting? can you not be jousting? can he not be jousting? can we not be jousting? can you not be jousting? can they not be jousting?
Perfect
can I not have jousted? can you not have jousted? can he not have jousted? can we not have jousted? can you not have jousted? can they not have jousted?
V-ing perfect
can I not have been jousting? can you not have been jousting? can he not have been jousting? can we not have been jousting? can you not have been jousting? can they not have been jousting?