English verb conjugation
COULD PREINVESTIGATE PREINVESTIGATE

Regular verb: preinvestigate preinvestigate - preinvestigate preinvestigated - preinvestigate preinvestigated

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could preinvestigate preinvestigate you could preinvestigate preinvestigate she could preinvestigate preinvestigate we could preinvestigate preinvestigate you could preinvestigate preinvestigate they could preinvestigate preinvestigate	I could be preinvestigate preinvestigating you could be preinvestigate preinvestigating she could be preinvestigate preinvestigating we could be preinvestigate preinvestigating you could be preinvestigate preinvestigating they could be preinvestigate preinvestigating
Perfect	V-ing perfect
I could have preinvestigate preinvestigated you could have preinvestigate preinvestigated she could have preinvestigate preinvestigated we could have preinvestigate preinvestigated you could have preinvestigate preinvestigated they could have preinvestigate preinvestigated	I could have been preinvestigate preinvestigating you could have been preinvestigate preinvestigating she could have been preinvestigate preinvestigating we could have been preinvestigate preinvestigating you could have been preinvestigate preinvestigating they could have been preinvestigate preinvestigating

Negation

Simple form	V-ing form
I could not preinvestigate preinvestigate you could not preinvestigate preinvestigate she could not preinvestigate preinvestigate we could not preinvestigate preinvestigate you could not preinvestigate preinvestigate they could not preinvestigate preinvestigate	I could not be preinvestigate preinvestigating you could not be preinvestigate preinvestigating she could not be preinvestigate preinvestigating we could not be preinvestigate preinvestigating you could not be preinvestigate preinvestigating they could not be preinvestigate preinvestigating
Perfect	V-ing perfect
I could not have preinvestigate preinvestigated you could not have preinvestigate preinvestigated she could not have preinvestigate preinvestigated we could not have preinvestigate preinvestigated you could not have preinvestigate preinvestigated they could not have preinvestigate preinvestigated	I could not have been preinvestigate preinvestigating you could not have been preinvestigate preinvestigating she could not have been preinvestigate preinvestigating we could not have been preinvestigate preinvestigating you could not have been preinvestigate preinvestigating they could not have been preinvestigate preinvestigating

Interrogative form

Simple form	V-ing form
could I preinvestigate preinvestigate? could you preinvestigate preinvestigate? could she preinvestigate preinvestigate? could we preinvestigate preinvestigate? could you preinvestigate preinvestigate? could they preinvestigate preinvestigate?	could I be preinvestigate preinvestigating? could you be preinvestigate preinvestigating? could she be preinvestigate preinvestigating? could we be preinvestigate preinvestigating? could you be preinvestigate preinvestigating? could they be preinvestigate preinvestigating?
Perfect	V-ing perfect
could I have preinvestigate preinvestigated? could you have preinvestigate preinvestigated? could she have preinvestigate preinvestigated? could we have preinvestigate preinvestigated? could you have preinvestigate preinvestigated? could they have preinvestigate preinvestigated?	could I have been preinvestigate preinvestigating? could you have been preinvestigate preinvestigating? could she have been preinvestigate preinvestigating? could we have been preinvestigate preinvestigating? could you have been preinvestigate preinvestigating? could they have been preinvestigate preinvestigating?

Interro-negative form

Simple form	V-ing form
could I not preinvestigate preinvestigate? could you not preinvestigate preinvestigate? could she not preinvestigate preinvestigate? could we not preinvestigate preinvestigate? could you not preinvestigate preinvestigate? could they not preinvestigate preinvestigate?	could I not be preinvestigate preinvestigating? could you not be preinvestigate preinvestigating? could she not be preinvestigate preinvestigating? could we not be preinvestigate preinvestigating? could you not be preinvestigate preinvestigating? could they not be preinvestigate preinvestigating?
Perfect	V-ing perfect
could I not have preinvestigate preinvestigated? could you not have preinvestigate preinvestigated? could she not have preinvestigate preinvestigated? could we not have preinvestigate preinvestigated? could you not have preinvestigate preinvestigated? could they not have preinvestigate preinvestigated?	could I not have been preinvestigate preinvestigating? could you not have been preinvestigate preinvestigating? could she not have been preinvestigate preinvestigating? could we not have been preinvestigate preinvestigating? could you not have been preinvestigate preinvestigating? could they not have been preinvestigate preinvestigating?