[新知导引]
诵读下列例句并感知画线部分的共性
1．It's not a real sport, is it?
2．That sounds interesting, doesn't it?
3．Hi! It's a beautiful day, isn't it?
4．Come along and join us, will you?
5．By the way, our school soccer team won at last, didn't they?
[共性呈现]
1．所有画线部分都是附加疑问句。
2．句1为陈述句为否定句的附加疑问句；
3．句2,3,5 为陈述句为肯定句的附加疑问句；
4．句4为祈使句的附加疑问句。
