英语第三人称单数My brother 我的兄弟 是第三人称单数吗将His brother wants to get hi

我的兄弟当然是第三人称单数.
要记住人名,家庭成员或者是一个名词的单数都是第三人称单数.
将His brother wants to get his book back.(改为否定句）
需要注意do（助动词）后要加动词原形.
所以是His brother doesn't want to get his book back.