what colour's your……中的colour为什么加s?

What`s your favorite colour? What's your favourite colour what colour's your new dress? What`s your favorite colour?高者快来! What's is your (favourite)colour? what colour's your new dress 和what colour's are your new dre What's your mother's favorite colour?为什么是mother's而不是mother what colour's your...和what colour are your...有什么区别?哪个比较合适? what's your partner's favourite colour?中文意思 is this you watch 和what colour 's your new dress 中的句子成分 What colour are your new shoes AThey are brown colour B.It's 英语翻译My favourite colour.Hello!What's your favourite colour?R