Last Saturday our town held a small science fair in the school hall. Dana built a wind turbine, and her brother Arman showed a water filter. Visitors asked many questions. One man wondered how the filter worked. Arman explained that sand and charcoal remove dirt from the water. 'Look at the clear water!' he said. 'It is amazing, isn't it?' said a woman. Because the judges were impressed, they gave him a special prize. Dana, who had worked on her turbine for a month, won second place. Nobody was disappointed, for everyone had learned something new.
In the sentence 'Dana, who had worked on her turbine for a month, won second place', the clause 'who had worked on her turbine for a month' is …
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Верный ответ
- Ba subordinate clause adding details about Dana
Разбор
The main clause is 'Dana won second place'. The clause with 'who' cannot stand alone and is placed inside the main clause between commas. It is a subordinate relative clause that gives extra information about the subject 'Dana'. It is not a main or coordinate clause, and it does not answer the question 'when?'.