【摘 要】
：
一、现在完成时的构成:have/ has+动词的过去分词动词过去分词的构成和动词过去式的构成一样,也分为规则和不规则两种。规则动词过去分词的变化方式与规则动词的过去式变化方
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一、现在完成时的构成:have/ has+动词的过去分词动词过去分词的构成和动词过去式的构成一样,也分为规则和不规则两种。规则动词过去分词的变化方式与规则动词的过去式变化方式一样,即在动词后加-ed;不规则的动词过去分词则需要专门去记忆。二、现在完成时的用法:①表示过去发
First, the composition at the time of completion: The past participle verb of has/have+ verb The composition of the past participle is the same as that of the past tense of the verb. It is also divided into two types: regular and irregular. The way of changing the past participle of regular verbs is the same as that of regular verbs, that is, adding ed after verbs; irregular verbs past participles need special memory. Second, the usage is now completed: 1 means that the past hair
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