1、Sam watches TV every evening.（改为一般疑问句）
（ Does ）Sam ( watch )TV every evening?
2、These boys often play in their rooms(改为单数句)
（ The ）（ boy ）often ( plays ) in ( his ) room.
3、Jeff likes to eat (chicken and carrots).(就括号部分提问)
（ What ） （ does ）Jeff ( like ) to ( eat)