题目内容
19．I don't know if he tomorrow．（ ）| A． | go climbing | B． | will go climbing | ||
| C． | goes climbing | D． | went climbing |
分析 我不知道明天他是否去爬山．
解答 答案：B
根据语境推测句意是"我不知道明天他是否去爬山．"，本句中的if意思是"是否"，引导宾语从句，主句是一般现在时，从句根据时间状语tomorrow确定用一般将来时，一般将来时的构成是：主语+will+动词原形，故选B．
点评 本题考查了动词的时态．做题时，一定要特别关注有关的时间短语，这是判断句子时态的标志．在没有时间状语的情况下可以联系上下文根据状语从句的类型来做出正确判断．
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