The boy went （hand in hand） to the yard where ships were built.

The crab ran away in such a desperate hurry that Davy opened his eyes wide and said.

句子开头应大写！

一些基本的词组和结构。网友怎么还继续糊涂着？

hand in hand：名词词组，副词用法，作 went 的方式状语。

such...that...结构：主句含有表程度的限定词 such， 产生了由 that 引导的结果状语从句。