shall diphthongise
Regular verb: diphthongise - diphthongised- diphthongised

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

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

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

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