原句:He is going to play football.
否定句He isn't going to play football.
疑问:Is he going to play football?
回答:Yes,he is./No,he isn't.
原句:He is going to play football.
否定句He isn't going to play football.
疑问:Is he going to play football?
回答:Yes,he is./No,he isn't.