由句意得，如老师允许我们会去公园 那么，其否定就是我们不会去公园如果老师不允许 所以应该改为We shall not go to the park if the teacher does not let us.
We'll not go to the park unless the teacher lets us.
We shouldn`t go to the park if the teacher doesn`t let us
We shall not go to the park if the teacher doesn't let us. 相信姐姐，墨有错！姐姐英语竞赛得奖的！！！
We won"t go to the park no matter how the teacher lets us. 这么讲应该比较符合情理吧~
We well not go to the park if the teacher lets us.
We shall not go to the park if the teacher lets us. 就这样改，对的
答：这南国树不美丽。否定局必须有否定词。详情>>
答：氧化铜有强氧化性，可以氧化CO，放出CO2。 氢氧化钠溶液，可与CO2反应：CO2+2NaOH=NaCO3+H2O 浓硫酸,有吸水性，水蒸气就没了。 最后只剩氮...详情>>
答：保修卡详情>>
