拿这个陈述句举例来说：(there is )
There is going to be a match next month.
否定句:
There is not going to be a match next month.
疑问句：
Is there going to be a match next month?
肯定回答：Yes,there is.
否定回答：No,there isn't.
拿这个陈述句举例来说：(there are )
There are some boats in the river.
否定句：
There are not any boats in the river.
疑问句：
Are there any boats in the river?
肯定回答：Yes,there are.
否定回答：No,there aren't.