I can helenise you can helenise he can helenise we can helenise you can helenise they can helenise
V-ing form
I can be helenising you can be helenising he can be helenising we can be helenising you can be helenising they can be helenising
Perfect
I can have helenised you can have helenised he can have helenised we can have helenised you can have helenised they can have helenised
V-ing perfect
I can have been helenising you can have been helenising he can have been helenising we can have been helenising you can have been helenising they can have been helenising
Negation
Simple form
I can't helenise you can't helenise he can't helenise we can't helenise you can't helenise they can't helenise
V-ing form
I can't be helenising you can't be helenising he can't be helenising we can't be helenising you can't be helenising they can't be helenising
Perfect
I can't have helenised you can't have helenised he can't have helenised we can't have helenised you can't have helenised they can't have helenised
V-ing perfect
I can't have been helenising you can't have been helenising he can't have been helenising we can't have been helenising you can't have been helenising they can't have been helenising
Interrogative form
Simple form
can I helenise? can you helenise? can he helenise? can we helenise? can you helenise? can they helenise?
V-ing form
can I be helenising? can you be helenising? can he be helenising? can we be helenising? can you be helenising? can they be helenising?
Perfect
can I have helenised? can you have helenised? can he have helenised? can we have helenised? can you have helenised? can they have helenised?
V-ing perfect
can I have been helenising? can you have been helenising? can he have been helenising? can we have been helenising? can you have been helenising? can they have been helenising?
Interro-negative form
Simple form
can't I helenise? can't you helenise? can't he helenise? can't we helenise? can't you helenise? can't they helenise?
V-ing form
can't I be helenising? can't you be helenising? can't he be helenising? can't we be helenising? can't you be helenising? can't they be helenising?
Perfect
can't I have helenised? can't you have helenised? can't he have helenised? can't we have helenised? can't you have helenised? can't they have helenised?
V-ing perfect
can't I have been helenising? can't you have been helenising? can't he have been helenising? can't we have been helenising? can't you have been helenising? can't they have been helenising?