主动态动词的主要变化请参见下表中的例子：
规则动词的一般过去式和过去分词的构成都是在原形后加d或 ed，有时原形的末尾辅音字母必须双写，如slip，slipped。关于不规则动词，现在分词和动名词的变化总是规则的，其构成是在原形后加ing。在原形后加ing时，关于末尾的辅音字母的双写规则，这里也同样适用
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