I can philosophise you can philosophise she can philosophise we can philosophise you can philosophise they can philosophise
V-ing form
I can be philosophising you can be philosophising she can be philosophising we can be philosophising you can be philosophising they can be philosophising
Perfect
I can have philosophised you can have philosophised she can have philosophised we can have philosophised you can have philosophised they can have philosophised
V-ing perfect
I can have been philosophising you can have been philosophising she can have been philosophising we can have been philosophising you can have been philosophising they can have been philosophising
Negation
Simple form
I cannot philosophise you cannot philosophise she cannot philosophise we cannot philosophise you cannot philosophise they cannot philosophise
V-ing form
I cannot be philosophising you cannot be philosophising she cannot be philosophising we cannot be philosophising you cannot be philosophising they cannot be philosophising
Perfect
I cannot have philosophised you cannot have philosophised she cannot have philosophised we cannot have philosophised you cannot have philosophised they cannot have philosophised
V-ing perfect
I cannot have been philosophising you cannot have been philosophising she cannot have been philosophising we cannot have been philosophising you cannot have been philosophising they cannot have been philosophising
Interrogative form
Simple form
can I philosophise? can you philosophise? can she philosophise? can we philosophise? can you philosophise? can they philosophise?
V-ing form
can I be philosophising? can you be philosophising? can she be philosophising? can we be philosophising? can you be philosophising? can they be philosophising?
Perfect
can I have philosophised? can you have philosophised? can she have philosophised? can we have philosophised? can you have philosophised? can they have philosophised?
V-ing perfect
can I have been philosophising? can you have been philosophising? can she have been philosophising? can we have been philosophising? can you have been philosophising? can they have been philosophising?
Interro-negative form
Simple form
can I not philosophise? can you not philosophise? can she not philosophise? can we not philosophise? can you not philosophise? can they not philosophise?
V-ing form
can I not be philosophising? can you not be philosophising? can she not be philosophising? can we not be philosophising? can you not be philosophising? can they not be philosophising?
Perfect
can I not have philosophised? can you not have philosophised? can she not have philosophised? can we not have philosophised? can you not have philosophised? can they not have philosophised?
V-ing perfect
can I not have been philosophising? can you not have been philosophising? can she not have been philosophising? can we not have been philosophising? can you not have been philosophising? can they not have been philosophising?