I can characterise you can characterise he can characterise we can characterise you can characterise they can characterise
V-ing form
I can be characterising you can be characterising he can be characterising we can be characterising you can be characterising they can be characterising
Perfect
I can have characterised you can have characterised he can have characterised we can have characterised you can have characterised they can have characterised
V-ing perfect
I can have been characterising you can have been characterising he can have been characterising we can have been characterising you can have been characterising they can have been characterising
Negation
Simple form
I can't characterise you can't characterise he can't characterise we can't characterise you can't characterise they can't characterise
V-ing form
I can't be characterising you can't be characterising he can't be characterising we can't be characterising you can't be characterising they can't be characterising
Perfect
I can't have characterised you can't have characterised he can't have characterised we can't have characterised you can't have characterised they can't have characterised
V-ing perfect
I can't have been characterising you can't have been characterising he can't have been characterising we can't have been characterising you can't have been characterising they can't have been characterising
Interrogative form
Simple form
can I characterise? can you characterise? can he characterise? can we characterise? can you characterise? can they characterise?
V-ing form
can I be characterising? can you be characterising? can he be characterising? can we be characterising? can you be characterising? can they be characterising?
Perfect
can I have characterised? can you have characterised? can he have characterised? can we have characterised? can you have characterised? can they have characterised?
V-ing perfect
can I have been characterising? can you have been characterising? can he have been characterising? can we have been characterising? can you have been characterising? can they have been characterising?
Interro-negative form
Simple form
can't I characterise? can't you characterise? can't he characterise? can't we characterise? can't you characterise? can't they characterise?
V-ing form
can't I be characterising? can't you be characterising? can't he be characterising? can't we be characterising? can't you be characterising? can't they be characterising?
Perfect
can't I have characterised? can't you have characterised? can't he have characterised? can't we have characterised? can't you have characterised? can't they have characterised?
V-ing perfect
can't I have been characterising? can't you have been characterising? can't he have been characterising? can't we have been characterising? can't you have been characterising? can't they have been characterising?