3. What colour is it? What colour are they/these/those?上句中these， those，they都是复数，故be动词要用are。what colour是疑问词“什么颜色”，不论主语是单数还是复数，colour一词只能使用单数形式。如：错误：What colours are the cats? 正确：What colour are the cats?在以What colour引导的疑问句中，be动词的单复数形式要根据主语（所问事物）来决定。如：What colour is the apple? （主语是单数，使用is）What colour are the birds? （主语是复数，使用are）
4. 特殊疑问句：以特殊疑问词开头的疑问句称作特殊疑问句。语序为：疑问词＋be动词＋主语。朗读时的语调为降调，不用Yes或No来回答，而对所提出的问题作具体答复。如：What’s your name? My name is Gao Hui. What’s that? What colour is the boat?
5. whose的中文意思是谁的，是引导特殊问句的疑问词，常对名词性物主代词、形容词性物主代词及名词所有格形式进行提问。whose与who’s是同音词，但用法不同，whose可单独使用，也可与名词连用，表示“谁的……东西”，而 who’s＝who is （是谁）。Whose在句中的用法举例如下：Whose is this coat? Whose shoes are they?
6. Whose blouse is this?这是谁的衬衣？Whose shoes are these?这些是谁的鞋？（1）对名词性物主代词及不接名词的所有格提问时，whose常单独充当特殊疑问词。如：The brown shoes are his. Whose are the brown shoes? That blouse is Kate’s. Whose is that blouse? （2）对形容词性物主代词和后接名词所有格提问时，whose后必须加名词或充当疑问词，不能单独使用。如：It is Jim’s pen. Whose pen is it? Those are Mr. Green’s trousers. Whose trousers are those?