高考临近，以下是有两道易错的非谓语动词作状语考题，希望对大家有所帮助！

请看下面的两道题：

1. _________from the operation, the patient had to stay in hospital for another two weeks.

A. Having not fully recovered

B. Having not been fully recovered

C. Not having fully recovered

D. Not having been fully recovered

【答案与解析】此题容易错选D，其实正确答案是C，此题考查分词作状语的用法。由于非谓语动词的否定形式总是将否定词置于非谓语动词之前，而不是之后或之中，故可可排除A和B;而recover是不及物动词，不能用过去分词表被动，故可排除D。即答案选C。

2. _________ in China once a year, the National Day is one of the most popular festivals in China.

A. Celebrating B. Celebrated C. Having celebrated D. Having been celebrated

【答案与解析】此题容易错选D，其实正确答案是B，此题考查分词作状语的用法。由于celebrate 和the National Day是动宾关系，故可排除A和C;又因为once a year这个时间状语，强调的是动作一般状态而不是完成，所以选B。

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