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 must not prewash you must not prewash he must not prewash we must not prewash you must not prewash they must not prewash	I must not be prewashing you must not be prewashing he must not be prewashing we must not be prewashing you must not be prewashing they must not be prewashing
Perfect	V-ing perfect
I must not have prewashed you must not have prewashed he must not have prewashed we must not have prewashed you must not have prewashed they must not have prewashed	I must not have been prewashing you must not have been prewashing he must not have been prewashing we must not have been prewashing you must not have been prewashing they must not 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
must I not prewash? must you not prewash? must he not prewash? must we not prewash? must you not prewash? must they not prewash?	must I not be prewashing? must you not be prewashing? must he not be prewashing? must we not be prewashing? must you not be prewashing? must they not be prewashing?
Perfect	V-ing perfect
must I not have prewashed? must you not have prewashed? must he not have prewashed? must we not have prewashed? must you not have prewashed? must they not have prewashed?	must I not have been prewashing? must you not have been prewashing? must he not have been prewashing? must we not have been prewashing? must you not have been prewashing? must they not have been prewashing?