åå¥ï¼He is going to play football.
å¦å®å¥He isn't going to play football.
çé®ï¼Is he going to play football?
åçï¼Yes,he is./No,he isn't.
追é®å®ä»¬çç»æ
追çbe not going to (å¦å®å¥)
be +主è¯+going to ...(ä¸è¬çé®å¥ï¼
Yesï¼ ä¸»è¯+be
No, 主è¯+be not