I can externalise you can externalise he can externalise we can externalise you can externalise they can externalise
V-ing form
I can be externalising you can be externalising he can be externalising we can be externalising you can be externalising they can be externalising
Perfect
I can have externalised you can have externalised he can have externalised we can have externalised you can have externalised they can have externalised
V-ing perfect
I can have been externalising you can have been externalising he can have been externalising we can have been externalising you can have been externalising they can have been externalising
Negation
Simple form
I can't externalise you can't externalise he can't externalise we can't externalise you can't externalise they can't externalise
V-ing form
I can't be externalising you can't be externalising he can't be externalising we can't be externalising you can't be externalising they can't be externalising
Perfect
I can't have externalised you can't have externalised he can't have externalised we can't have externalised you can't have externalised they can't have externalised
V-ing perfect
I can't have been externalising you can't have been externalising he can't have been externalising we can't have been externalising you can't have been externalising they can't have been externalising
Interrogative form
Simple form
can I externalise? can you externalise? can he externalise? can we externalise? can you externalise? can they externalise?
V-ing form
can I be externalising? can you be externalising? can he be externalising? can we be externalising? can you be externalising? can they be externalising?
Perfect
can I have externalised? can you have externalised? can he have externalised? can we have externalised? can you have externalised? can they have externalised?
V-ing perfect
can I have been externalising? can you have been externalising? can he have been externalising? can we have been externalising? can you have been externalising? can they have been externalising?
Interro-negative form
Simple form
can't I externalise? can't you externalise? can't he externalise? can't we externalise? can't you externalise? can't they externalise?
V-ing form
can't I be externalising? can't you be externalising? can't he be externalising? can't we be externalising? can't you be externalising? can't they be externalising?
Perfect
can't I have externalised? can't you have externalised? can't he have externalised? can't we have externalised? can't you have externalised? can't they have externalised?
V-ing perfect
can't I have been externalising? can't you have been externalising? can't he have been externalising? can't we have been externalising? can't you have been externalising? can't they have been externalising?