狼、羊、菜过河

Title: A man needs to transport a wolf, a goat, and a cabbage from the left bank of a river to the right bank, but his boat is too small and can only carry one item at a time. Since the wolf will eat the goat, and the goat will eat the cabbage, the wolf and the goat, as well as the goat and the cabbage, cannot be left unsupervised together. How can the man accomplish his goal?