His baseball is under the table.句首的his baseball 可以看作第三人称单数吗?

His baseball is under the table.句首的his baseball 可以看作第三人称单数吗? his baseball is under the table . His baseball is under the table.（改为否定句） His baseb his baseball is under the table 肯定回答 his baseball is under the table变一般疑问句 his dresser is next to his baseball under the table 改为一般疑问句his dresser is next to h his baseball is on the f under his chair ( ) the baseball under table? (His baseball) is under the bookcase?就括号部分提问 That is his baseball.改为复数句 My tennis ball is (under the bed) His baseball is under his bed 变成一般疑问句 把His baseball is under the bed(改为一般疑问句) 把His key