starting to appear that automate...的分析与理解

Behavioral synthesis tools are starting to appear that automate the process from about step 2 onwards.

请问这里 that 后面的部分不是从句，automate 是动词。这里that后的内容作为什么语法理解呢?

Behavioral synthesis tools are starting to appear that automate the process from about step 2 onwards.

划线部分为定语从句，that为关系代词，指代主语Behavioral synthesis tools。这种定语从句称为分隔式定语从句。定语从句与先行词分隔，目的是为了避免句子头重脚轻（主语部分过长，谓语部分过短——违背尾重原则）。

曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 1秒前

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