English verb conjugation
OUGHT TO CLASH

Regular verb: clash - clashed - clashed

Affirmation

Simple form	V-ing form
I ought to clash you ought to clash he ought to clash we ought to clash you ought to clash they ought to clash	I ought to be clashing you ought to be clashing he ought to be clashing we ought to be clashing you ought to be clashing they ought to be clashing
Perfect	V-ing perfect
I ought to have clashed you ought to have clashed he ought to have clashed we ought to have clashed you ought to have clashed they ought to have clashed	I ought to have been clashing you ought to have been clashing he ought to have been clashing we ought to have been clashing you ought to have been clashing they ought to have been clashing

Negation

Simple form	V-ing form
I oughtn't to clash you oughtn't to clash he oughtn't to clash we oughtn't to clash you oughtn't to clash they oughtn't to clash	I oughtn't to be clashing you oughtn't to be clashing he oughtn't to be clashing we oughtn't to be clashing you oughtn't to be clashing they oughtn't to be clashing
Perfect	V-ing perfect
I oughtn't to have clashed you oughtn't to have clashed he oughtn't to have clashed we oughtn't to have clashed you oughtn't to have clashed they oughtn't to have clashed	I oughtn't to have been clashing you oughtn't to have been clashing he oughtn't to have been clashing we oughtn't to have been clashing you oughtn't to have been clashing they oughtn't to have been clashing

Interrogative form

Simple form	V-ing form
ought to I clash? ought to you clash? ought to he clash? ought to we clash? ought to you clash? ought to they clash?	ought to I be clashing? ought to you be clashing? ought to he be clashing? ought to we be clashing? ought to you be clashing? ought to they be clashing?
Perfect	V-ing perfect
ought to I have clashed? ought to you have clashed? ought to he have clashed? ought to we have clashed? ought to you have clashed? ought to they have clashed?	ought to I have been clashing? ought to you have been clashing? ought to he have been clashing? ought to we have been clashing? ought to you have been clashing? ought to they have been clashing?

Interro-negative form

Simple form	V-ing form
oughtn't I to clash? oughtn't you to clash? oughtn't he to clash? oughtn't we to clash? oughtn't you to clash? oughtn't they to clash?	oughtn't I to be clashing? oughtn't you to be clashing? oughtn't he to be clashing? oughtn't we to be clashing? oughtn't you to be clashing? oughtn't they to be clashing?
Perfect	V-ing perfect
oughtn't I to have clashed? oughtn't you to have clashed? oughtn't he to have clashed? oughtn't we to have clashed? oughtn't you to have clashed? oughtn't they to have clashed?	oughtn't I to have been clashing? oughtn't you to have been clashing? oughtn't he to have been clashing? oughtn't we to have been clashing? oughtn't you to have been clashing? oughtn't they to have been clashing?