问一点点英语语法及其翻译Through the years, the Hatches paid for local ch

问一点点英语语法及其翻译
Through the years, the Hatches paid for local children to attend summer camp when their parents (40)_____ not afford it. “Ish and Arlene never asked whether you needed anything,” says their friend Sand Van Weelden, “They could see the things they could do to make you happier, and they would do them.”
答案could
帮我翻译一下并讲讲它的语法,不要机器翻译谢谢!