http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
hadn't [美 ˈhædnt, 英 ˈhad(ə)nt]
hadn't → had not
在《PONS词典》中的词汇
英语
西班牙语
hadn't [ˈhædnt]
hadn't = had not, have
I. have [həv, stressed: hæv] has, had, had has, had, had 动词 trans
1. have (own):
2. have (engage in):
3. have (eat):
5. have (receive):
7. have (cause to occur):
8. have (understand):
短语，惯用语:
II. have [həv, stressed: hæv] has, had, had has, had, had 动词 助动词 (indicates perfect tense)
西班牙语
英语
在《PONS词典》中的词汇
英语
西班牙语
hadn't [ˈhæd·ənt]
hadn't = had not, have
I. have <has, had, had> [hæv, unstressed: həv] 动词 trans
1. have (own):
2. have (engage in):
3. have (eat):
5. have (receive):
6. have (show trait):
7. have (cause to occur):
II. have <has, had, had> [hæv, unstressed: həv] 动词 助动词
1. have (indicates perfect tense):
PONS词典中的例句（已经编辑处理）
单语范例（未经PONS编辑处理）
So there is another safety issue that you hydrogen-phobes may have to reckon on.
www.gizmag.com Reckon on bending it no more than the size of a quarter.
www.technewsworld.com Reckon on about four plants to a 12in/30cm container.
www.telegraph.co.uk If they turn out to be true, readers will have to reckon on their own with the disjunction of biographical fact with biographical supposition.
www.newyorker.com I reckon on that, you'd say he might want six (furlongs).
www.skysports.com