In his will,he 【requested that 】after payment of debts,taxes,and funeral expenses,the residue 【（should）be given to his wife】.
他在遗嘱里要求.括号里是句子的主体.
request that...(should) do sth...这里的do一定要用原型
类似还有pray ,let,suggest等等这些表命令等语气的情态动词,这个be的前面还可以加上should,也可以省略.