Well, In this class,they are supposed to be reviewed before new knowledge. The word stress depends on the quantities of syllable.One syllable needn’t be stressed,such as “go/book ” .Disyllable and tri-syllable should stress on the first syllable,such as ’apple/’property. As for multi-syllable which should stress on the antepenultimate syllable,such as anni’versary/de’mocracy and so on.