ought to tread
Irregular verb: tread - trod- trod, trodden

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to tread
you ought to tread
she ought to tread
we ought to tread
you ought to tread
they ought to tread 	I ought to be treading
you ought to be treading
she ought to be treading
we ought to be treading
you ought to be treading
they ought to be treading	I ought to have trod, trodden
you ought to have trod, trodden
she ought to have trod, trodden
we ought to have trod, trodden
you ought to have trod, trodden
they ought to have trod, trodden	I ought to have been treading
you ought to have been treading
she ought to have been treading
we ought to have been treading
you ought to have been treading
they ought to have been treading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to tread
you oughtn't to tread
she oughtn't to tread
we oughtn't to tread
you oughtn't to tread
they oughtn't to tread 	I oughtn't to be treading
you oughtn't to be treading
she oughtn't to be treading
we oughtn't to be treading
you oughtn't to be treading
they oughtn't to be treading	I oughtn't to have trod, trodden
you oughtn't to have trod, trodden
she oughtn't to have trod, trodden
we oughtn't to have trod, trodden
you oughtn't to have trod, trodden
they oughtn't to have trod, trodden	I oughtn't to have been treading
you oughtn't to have been treading
she oughtn't to have been treading
we oughtn't to have been treading
you oughtn't to have been treading
they oughtn't to have been treading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I tread?
ought to you tread?
ought to she tread?
ought to we tread?
ought to you tread?
ought to they tread? 	ought to I be treading?
ought to you be treading?
ought to she be treading?
ought to we be treading?
ought to you be treading?
ought to they be treading? 	ought to I have trod, trodden?
ought to you have trod, trodden?
ought to she have trod, trodden?
ought to we have trod, trodden?
ought to you have trod, trodden?
ought to they have trod, trodden? 	ought to I have been treading?
ought to you have been treading?
ought to she have been treading?
ought to we have been treading?
ought to you have been treading?
ought to they have been treading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to tread?
oughtn't you to tread?
oughtn't she to tread?
oughtn't we to tread?
oughtn't you to tread?
oughtn't they to tread? 	oughtn't I to be treading?
oughtn't you to be treading?
oughtn't she to be treading?
oughtn't we to be treading?
oughtn't you to be treading?
oughtn't they to be treading? 	oughtn't I to have trod, trodden?
oughtn't you to have trod, trodden?
oughtn't she to have trod, trodden?
oughtn't we to have trod, trodden?
oughtn't you to have trod, trodden?
oughtn't they to have trod, trodden? 	oughtn't I to have been treading?
oughtn't you to have been treading?
oughtn't she to have been treading?
oughtn't we to have been treading?
oughtn't you to have been treading?
oughtn't they to have been treading?