核心问题
（A）I have got the courage to quarrel with them. 我敢同他们争吵。
(B) I have got to work tomorrow. 我明天必须上班。
have got 在句(A)中作“有”解,在句(B)中作“必须”解。它们的否定形式是什么?是 don't have got,还是 haven't got(to)?
词典解答
have got 不管用于句(A)，还是用于句(B)，其否定形式都是 haven't got(to)。例如：
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I haven't got a thermometer. (Cronin) 我没有温度计。
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She hasn't got a bank account. (Priestley) 她没有银行账户。
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We haven't got to work tomorrow. (PEU) 我们明天不必上班。
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I haven't got the courage to quarrel with them. (CGEL) 我没有勇气同他们争吵。