Covered Wagon Days
All the men had guns for protection, in case we should be attacked by the Indians.
in case: if by any chance;for fear that 以防, 免得, 万一(后面的从句可用虚拟语气也可不用)
---Take your coat in case it rains / in case it should rain.
---In case anything important happens, please call me up.
---I’ll cook plenty of potatoes (just) in case they decide to stay for dinner.
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