...境就可以判断了，表目的 be doing表示习惯和进行时的话，简单说表示一种性质判断，“be”在性质上属于接系动词(The Linking Verb)，你所举的前两个例子都是这种情况，助动词be的过去式后加动词的现在分词形式。
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According to the semantic distinctions of themes, the verbs fall into 5 classes, namely the behavioral verb, the state verb, the rendering verb, the perceptive verb and the linking verb.
本文根据主事的语义差别，把动词分为5类，即：动作动词、性状动词、致使动词、感知动词和关系动词。
In 'She became angry', the verb 'became' is a linking verb.
在She became angry一句中，动词became为连系动词。
I want you to look up the difference between a linking verb, and an…
我想让你查查系动词与实义动词间的区别。 …我要您查寻一个连接的动词…
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