由一般疑问句变来的用 IF / WHETHER.由选择疑问句变来的要用WHETHER- - - - -OR -- - .看例句：
1 " DO YOU LIKE FOOTBALL,TOM?" MARY SAID.(一般疑问句)
MARY ASKED TOM IF / WHETHER HE LIKED FOOTBALL.
2 ' DO YOU LIKE FOOTBALL OR BASKETBALL?' MARY SAID TO TOM (选择疑问句)
MARY ASKED TOM WHETHER HE LIKED FOOTBALL OR BASKETBALL.