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▲ 下面以e结尾的动词，在加-ing时，不必去e，而直接加上去：
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hoe—hoeing
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dye—dyeing
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tiptoe—tiptoeing
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eye—eyeing
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age—ag(e)ing
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▲ 以“单元音＋辅音结尾”的重读音节，加-ing和-ed时，末尾的辅音字母也要双写：
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prefer—preferring—preferred
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permit—permitting—permitted
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▲ 在英式英语中，像travel，quarrel这种以l结尾的词，加词尾时，l也要双写：
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travel—travelling—travelled
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quarrel—quarrelling—quarrelled
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但美式英语中，l却不双写。
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▲ 在英式英语中，有时在美式英语中，下列词加词尾时，末尾字母也双写，尽管这个音节不重读：
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program—programming—programmed
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kidnap—kidnapping—kidnapped
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worship—worshipping—worshipped
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hiccup—hiccupping—hiccupped
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handicap加-ed/-ing时也将p双写：handicapped/handicapping
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及物动词与不及物动词：
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（1）及物动词都跟有宾语，宾语有下面几类：
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1）名词作宾语：
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1704963803
Show your passport, please！请出示护照！
1704963804