Question

17．不要独自外出，否则你可能会迷路．
Don't go out alone，or you will lose your way．

Answer 1

分析 Don't go out alone，or you will lose your way．

解答 答案：Don't go out alone，or you will lose your way．用or表示否则，故用祈使句+or+陈述句来表达，否定祈使句don't+动词原形，go out alone独自外出，陈述句部分表达的是将来的事情用一般将来时will+动词原形，lose one‘s way迷路，主语you，故答案是Don't go out alone，or you will lose your way．

点评 祈使句，+and+陈述句：在这里祈使句相当于if 引导的条件状语从句（但此时去掉and）．
Give blood （ if you can ）and many lives will be saved．
还可以用简短的形式表示，即省略动词．
Give me one more hour，and I'll get the work finished．（祈使句）
═One more hour，and I'll get the work finished．（名词短语）
═If you give me one more hour，I'll get the work finished．（if条件句）
═If I am given one more hour，I'll get the work finished．
═Given one more hour，I'll get the work finished．
祈使句，+or+陈述句
Listen to the teacher carefully in class，or you can't catch what he is saying．