Does the factory maintain records showing proof that all paints, coatings and non-paint components are tested for Lead and Heavy Metals？ 请对此句话进行语法分析
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This sentence is an interrogative sentence asking about factory record maintenance. The main structure consists of the auxiliary verb 'Does', the subject 'the factory', and the predicate 'maintain records'. The participial phrase 'showing proof' modifies 'records', describing what kind of records the factory should maintain.
The participial phrase 'showing proof' contains a present participle 'showing' and its direct object 'proof'. This phrase modifies the noun 'records'. The noun clause 'that all paints, coatings and non-paint components are tested' acts as an appositive, explaining what the proof demonstrates. The prepositional phrase 'for Lead and Heavy Metals' specifies what the testing is for.
The noun clause begins with the subordinating conjunction 'that', which introduces the clause. The subject is 'all paints, coatings and non-paint components', which are the items being discussed. The verb 'are tested' is in passive voice, indicating that these components receive the action of testing. The prepositional phrase 'for Lead and Heavy Metals' specifies what substances the testing is designed to detect.
The phrase 'are tested' demonstrates passive voice construction. In passive voice, the focus shifts from who performs the action to what receives the action. Here, 'are' is the auxiliary verb and 'tested' is the past participle. The components become the subject receiving the action, while the agent who performs the testing is implied rather than explicitly stated.
In summary, this complex interrogative sentence demonstrates multiple grammatical structures working together. It begins with an auxiliary verb forming a question, includes a participial phrase modifying the direct object, contains a noun clause with passive voice construction, and ends with a prepositional phrase specifying the testing parameters. This type of sentence structure is common in formal regulatory and compliance contexts.