“祈使句+or+陈述句” 前后表达的意思是对立的； “祈使句+and+陈述句” 前后表达的意思是统一的；两句都可转换成“If条件从句+主句”形式，注意要去掉or 和and。如：[文章版权 禁止转载:考试与评价 Y&3ms?]6`=5Yu?48IDFroG]

    (1)Put on your coat，or you'll catch a cold.[文章版权 禁止转载:考试与评价 !+.I"Qp&a~U?/+FroG]

    =If you don't put on your coat，you'll catch a cold.[文章版权 禁止转载:考试与评价 Lr kxi(;G-W]sFroG]

    (2)Study hard，and you will pass the exam.[文章版权 禁止转载:考试与评价 @ 1"6{S?/ Q-#A\FroG]

    =If you study hard，you will pass the exam.[文章版权 禁止转载:考试与评价 3/PeQ3Y{wF|;;5jFroG]