English verb conjugation
MUST PREWASH

Regular verb: prewash - prewashed - prewashed

Affirmation

Simple form	V-ing form
I must prewash you must prewash he must prewash we must prewash you must prewash they must prewash	I must be prewashing you must be prewashing he must be prewashing we must be prewashing you must be prewashing they must be prewashing
Perfect	V-ing perfect
I must have prewashed you must have prewashed he must have prewashed we must have prewashed you must have prewashed they must have prewashed	I must have been prewashing you must have been prewashing he must have been prewashing we must have been prewashing you must have been prewashing they must have been prewashing

Negation

Simple form	V-ing form
I mustn't prewash you mustn't prewash he mustn't prewash we mustn't prewash you mustn't prewash they mustn't prewash	I mustn't be prewashing you mustn't be prewashing he mustn't be prewashing we mustn't be prewashing you mustn't be prewashing they mustn't be prewashing
Perfect	V-ing perfect
I mustn't have prewashed you mustn't have prewashed he mustn't have prewashed we mustn't have prewashed you mustn't have prewashed they mustn't have prewashed	I mustn't have been prewashing you mustn't have been prewashing he mustn't have been prewashing we mustn't have been prewashing you mustn't have been prewashing they mustn't have been prewashing

Interrogative form

Simple form	V-ing form
must I prewash? must you prewash? must he prewash? must we prewash? must you prewash? must they prewash?	must I be prewashing? must you be prewashing? must he be prewashing? must we be prewashing? must you be prewashing? must they be prewashing?
Perfect	V-ing perfect
must I have prewashed? must you have prewashed? must he have prewashed? must we have prewashed? must you have prewashed? must they have prewashed?	must I have been prewashing? must you have been prewashing? must he have been prewashing? must we have been prewashing? must you have been prewashing? must they have been prewashing?

Interro-negative form

Simple form	V-ing form
mustn't I prewash? mustn't you prewash? mustn't he prewash? mustn't we prewash? mustn't you prewash? mustn't they prewash?	mustn't I be prewashing? mustn't you be prewashing? mustn't he be prewashing? mustn't we be prewashing? mustn't you be prewashing? mustn't they be prewashing?
Perfect	V-ing perfect
mustn't I have prewashed? mustn't you have prewashed? mustn't he have prewashed? mustn't we have prewashed? mustn't you have prewashed? mustn't they have prewashed?	mustn't I have been prewashing? mustn't you have been prewashing? mustn't he have been prewashing? mustn't we have been prewashing? mustn't you have been prewashing? mustn't they have been prewashing?