English verb conjugation
CAN DIPHTHONGISE

Regular verb: diphthongise - diphthongised - diphthongised

Affirmation

Simple form	V-ing form
I can diphthongise you can diphthongise he can diphthongise we can diphthongise you can diphthongise they can diphthongise	I can be diphthongising you can be diphthongising he can be diphthongising we can be diphthongising you can be diphthongising they can be diphthongising
Perfect	V-ing perfect
I can have diphthongised you can have diphthongised he can have diphthongised we can have diphthongised you can have diphthongised they can have diphthongised	I can have been diphthongising you can have been diphthongising he can have been diphthongising we can have been diphthongising you can have been diphthongising they can have been diphthongising

Negation

Simple form	V-ing form
I can't diphthongise you can't diphthongise he can't diphthongise we can't diphthongise you can't diphthongise they can't diphthongise	I can't be diphthongising you can't be diphthongising he can't be diphthongising we can't be diphthongising you can't be diphthongising they can't be diphthongising
Perfect	V-ing perfect
I can't have diphthongised you can't have diphthongised he can't have diphthongised we can't have diphthongised you can't have diphthongised they can't have diphthongised	I can't have been diphthongising you can't have been diphthongising he can't have been diphthongising we can't have been diphthongising you can't have been diphthongising they can't have been diphthongising

Interrogative form

Simple form	V-ing form
can I diphthongise? can you diphthongise? can he diphthongise? can we diphthongise? can you diphthongise? can they diphthongise?	can I be diphthongising? can you be diphthongising? can he be diphthongising? can we be diphthongising? can you be diphthongising? can they be diphthongising?
Perfect	V-ing perfect
can I have diphthongised? can you have diphthongised? can he have diphthongised? can we have diphthongised? can you have diphthongised? can they have diphthongised?	can I have been diphthongising? can you have been diphthongising? can he have been diphthongising? can we have been diphthongising? can you have been diphthongising? can they have been diphthongising?

Interro-negative form

Simple form	V-ing form
can't I diphthongise? can't you diphthongise? can't he diphthongise? can't we diphthongise? can't you diphthongise? can't they diphthongise?	can't I be diphthongising? can't you be diphthongising? can't he be diphthongising? can't we be diphthongising? can't you be diphthongising? can't they be diphthongising?
Perfect	V-ing perfect
can't I have diphthongised? can't you have diphthongised? can't he have diphthongised? can't we have diphthongised? can't you have diphthongised? can't they have diphthongised?	can't I have been diphthongising? can't you have been diphthongising? can't he have been diphthongising? can't we have been diphthongising? can't you have been diphthongising? can't they have been diphthongising?