English verb conjugation
OUGHT TO STERILISE

Regular verb: sterilise - sterilised - sterilised

Affirmation

Simple form	V-ing form
I ought to sterilise you ought to sterilise she ought to sterilise we ought to sterilise you ought to sterilise they ought to sterilise	I ought to be sterilising you ought to be sterilising she ought to be sterilising we ought to be sterilising you ought to be sterilising they ought to be sterilising
Perfect	V-ing perfect
I ought to have sterilised you ought to have sterilised she ought to have sterilised we ought to have sterilised you ought to have sterilised they ought to have sterilised	I ought to have been sterilising you ought to have been sterilising she ought to have been sterilising we ought to have been sterilising you ought to have been sterilising they ought to have been sterilising

Negation

Simple form	V-ing form
I oughtn't to sterilise you oughtn't to sterilise she oughtn't to sterilise we oughtn't to sterilise you oughtn't to sterilise they oughtn't to sterilise	I oughtn't to be sterilising you oughtn't to be sterilising she oughtn't to be sterilising we oughtn't to be sterilising you oughtn't to be sterilising they oughtn't to be sterilising
Perfect	V-ing perfect
I oughtn't to have sterilised you oughtn't to have sterilised she oughtn't to have sterilised we oughtn't to have sterilised you oughtn't to have sterilised they oughtn't to have sterilised	I oughtn't to have been sterilising you oughtn't to have been sterilising she oughtn't to have been sterilising we oughtn't to have been sterilising you oughtn't to have been sterilising they oughtn't to have been sterilising

Interrogative form

Simple form	V-ing form
ought to I sterilise? ought to you sterilise? ought to she sterilise? ought to we sterilise? ought to you sterilise? ought to they sterilise?	ought to I be sterilising? ought to you be sterilising? ought to she be sterilising? ought to we be sterilising? ought to you be sterilising? ought to they be sterilising?
Perfect	V-ing perfect
ought to I have sterilised? ought to you have sterilised? ought to she have sterilised? ought to we have sterilised? ought to you have sterilised? ought to they have sterilised?	ought to I have been sterilising? ought to you have been sterilising? ought to she have been sterilising? ought to we have been sterilising? ought to you have been sterilising? ought to they have been sterilising?

Interro-negative form

Simple form	V-ing form
oughtn't I to sterilise? oughtn't you to sterilise? oughtn't she to sterilise? oughtn't we to sterilise? oughtn't you to sterilise? oughtn't they to sterilise?	oughtn't I to be sterilising? oughtn't you to be sterilising? oughtn't she to be sterilising? oughtn't we to be sterilising? oughtn't you to be sterilising? oughtn't they to be sterilising?
Perfect	V-ing perfect
oughtn't I to have sterilised? oughtn't you to have sterilised? oughtn't she to have sterilised? oughtn't we to have sterilised? oughtn't you to have sterilised? oughtn't they to have sterilised?	oughtn't I to have been sterilising? oughtn't you to have been sterilising? oughtn't she to have been sterilising? oughtn't we to have been sterilising? oughtn't you to have been sterilising? oughtn't they to have been sterilising?