题目内容
12．Mr．Green hatestravelling（travel） by air．He always falls asleep during the flight．分析 格林先生讨厌乘飞机旅行，他总是在飞行的时候睡觉．
解答 答案：travelling．句中hate表示讨厌，构成句型hate doing sth 讨厌做某事，动词travel的动名词是travelling，故答案是travelling．
点评 动名词的构成1．一般情况下直接加ing，2．以不发音的字母e结尾的单词，去掉字母e，再加ing.3以重读闭音节结尾，呈现"辅，元，辅"结构的动词，先双写末尾的辅音字母，再加ing 4 以ie结尾的动词，把ie改为y，再加ing
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