ought to inquire
Regular verb: inquire - inquired- inquired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to inquire
you ought to inquire
she ought to inquire
we ought to inquire
you ought to inquire
they ought to inquire 	I ought to be inquiring
you ought to be inquiring
she ought to be inquiring
we ought to be inquiring
you ought to be inquiring
they ought to be inquiring	I ought to have inquired
you ought to have inquired
she ought to have inquired
we ought to have inquired
you ought to have inquired
they ought to have inquired	I ought to have been inquiring
you ought to have been inquiring
she ought to have been inquiring
we ought to have been inquiring
you ought to have been inquiring
they ought to have been inquiring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to inquire
you oughtn't to inquire
she oughtn't to inquire
we oughtn't to inquire
you oughtn't to inquire
they oughtn't to inquire 	I oughtn't to be inquiring
you oughtn't to be inquiring
she oughtn't to be inquiring
we oughtn't to be inquiring
you oughtn't to be inquiring
they oughtn't to be inquiring	I oughtn't to have inquired
you oughtn't to have inquired
she oughtn't to have inquired
we oughtn't to have inquired
you oughtn't to have inquired
they oughtn't to have inquired	I oughtn't to have been inquiring
you oughtn't to have been inquiring
she oughtn't to have been inquiring
we oughtn't to have been inquiring
you oughtn't to have been inquiring
they oughtn't to have been inquiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I inquire?
ought to you inquire?
ought to she inquire?
ought to we inquire?
ought to you inquire?
ought to they inquire? 	ought to I be inquiring?
ought to you be inquiring?
ought to she be inquiring?
ought to we be inquiring?
ought to you be inquiring?
ought to they be inquiring? 	ought to I have inquired?
ought to you have inquired?
ought to she have inquired?
ought to we have inquired?
ought to you have inquired?
ought to they have inquired? 	ought to I have been inquiring?
ought to you have been inquiring?
ought to she have been inquiring?
ought to we have been inquiring?
ought to you have been inquiring?
ought to they have been inquiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to inquire?
oughtn't you to inquire?
oughtn't she to inquire?
oughtn't we to inquire?
oughtn't you to inquire?
oughtn't they to inquire? 	oughtn't I to be inquiring?
oughtn't you to be inquiring?
oughtn't she to be inquiring?
oughtn't we to be inquiring?
oughtn't you to be inquiring?
oughtn't they to be inquiring? 	oughtn't I to have inquired?
oughtn't you to have inquired?
oughtn't she to have inquired?
oughtn't we to have inquired?
oughtn't you to have inquired?
oughtn't they to have inquired? 	oughtn't I to have been inquiring?
oughtn't you to have been inquiring?
oughtn't she to have been inquiring?
oughtn't we to have been inquiring?
oughtn't you to have been inquiring?
oughtn't they to have been inquiring?