Using modals in passive sentences is actually quite easy, and you've already done a number of your sentences correctly. Look at this: ACTIVE: Someone will send the information. The active verb form is will send . That is modal + infinitive To

All his results were checked to decide whether we will hire him or not. Grammatically, doesn't the author have to supply the sentence with the hidden subject "we" in the form of "for us" because the subjects are

I unwittingly wrote a new post over my first through the edit function. I've just deleted the new message, and re-written my question as close to what I wrote initially as possible. All his results were checked to decide whether we will hire