5. The tea art performances show how to make a perfect cup of tea with beautiful tea sets.how to make a perfect cup of tea是“特殊疑问词+动词不定式”，在句子中作动词show的宾语。相当于特殊疑问词引导的宾语从句。

     例如：I don’t know what to do =I don’t know what I can do next.我不知道下一步做什么。

   【拓展】疑问词what，which，how，where，when等可以和动词不定式连用，构成不定式短语。“疑问词+动词不定式”可以做主语、宾语、表语等。

     例如： When to start off hasn’t been decided yet. 什么时候出发还没决定。(做主语) The question is which bus to take. 问题是乘哪辆公共汽车。(做表语)“疑问词+动词不定式”可以由名词从句简化而来。 I don’t know what I should say. → I don’t know what to say. 我不知道该说些什么。

　　练一练：

    I. 句型转换，按要求完成下列句子。

    1.Mary hasn’t been to Dalian.I haven’t been to Dalian，either.(改为同义句) _______ Mary _______ I ______ been to Dalian.

    2.Tom is the tallest boy in his class.(改为同义句) Tom is taller than ______ ______ _______ in his class.

    3.Linda hasn’t been to Wuhan.I haven’t been there, either.(改为同义句) Linda hasn’t been to Wuhan.______ ______.

    4.She’s been to Qingdao twice.(对划线部分提问) ______ ______ ______ has she been to Qingdao?  

    5.They have cleaned the classroom.(改为否定句) They _______ ________ the classroom.

    6.Has your brother finished his homework? (作肯定回答) Yes，_______ ________.

    II. 根据汉语提示，完成句子。

    1.四分之三以上的人口是中国人。 More than _______ of the population are Chinese.

    2.你将毫不费力地找到米饭、面条或饺子。 You won’t have any ______ ______ rice，noodles or dumplings.

    3.我不知道你是否喜欢印度食品。 I don’t know ______ you like Indian food.

    4.天黑的时候去动物园或许很奇怪。 It ______ ______ ______ to go to a zoo when it’s dark.

    5.你可以选择在你喜欢的任何时间去那里。 You can choose to go ______ ______ ______.

    6.如果你不去买东西，我也不去。 If you don’t go shopping，______ ______ ______.

    7.许多孩子已经听说那部电影了。 Lots of children have ______ _______ that movie already.

    8.我常看见他们在家写作业。 I often ______ ______ _______their homework at home.

    9.这本字典比其他的字典贵很多。 This dictionary is more expensive than ______ ______ ______.

   10.在博物馆有那么多好看的东西。 There’s ______ ______ ______ to see in the museum.