He spoke loudly so that everyone would hear him改错题为什么不能用would 而要改could.
问题描述：
He spoke loudly so that everyone would hear him
改错题
为什么不能用would 而要改could.
答
would表示将要的动作...could是表示能够，有能力。
答
would表将来,could表能力,这里不是说将能听到,是说目的是能听到注意so that呵呵