Question

16．He sometimes eats his lunch at school．（对划线部分提问）How often does he eat his lunch at school？．

Answer 1

分析 他有时候在学校吃午饭．
他多久在学校吃一次午饭？

解答 答案：How often does he eat his lunch at school？划线部分sometimes"有时候"，表示频率，用How often"多久"提问．后加一般疑问句语序，这里是一般现在时，主语是he三单，故借助于does构成一般疑问句，后加动词原形eat．故答案是How often does he eat his lunch at school？

点评 对划线部分提问要分析划线部分在句子中的成分，即可找出恰当的特殊疑问词．