Переклад слова «must» з англійської на українську мову

Isabella, and I must give him Kali Pandapatan's message.
Had the mainmast stood, he felt that she must have gone over.
Remember, lads, not a man of them must be suffered tocome on board.
He must make certain that the fall had killed Garnache.
George, this must be the trail of thefather of all birds!