He went with his father in the boat to fish，and from that time forward he began to wish to go to sea in one of the large ships that were constantly sailing away from the harbour near his father’s cottage.

1. in the boat：状语（方式状语“乘船”，修饰 went）

2. sail away from：指船只驶离，远离某地。away from 这个搭配网友还不熟悉？加上动词 sail （船只行驶），意思不就出来了？