题目内容

14.Hit the shark on the nose with your fist to avoid being bitten.

分析 用拳头打鲨鱼的鼻子以免被咬.

解答 bitten 考查被动语态.avoid doing是英语的固定结构"避免做…",根据句意:用拳头打鲨鱼的鼻子以免被咬,avoid后面要跟被动语态的非谓语结构,所以答案填bitten.

点评 被动语态由"助动词be+及物动词的过去分词"构成.被动语态的时态变化只改变be的形式,过去分词部分不变.疑问式和否定式的变化也如此.掌握各种时态的被动语态是解题的关键.

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