I don't think he could have done such a stupid thing last night,__ A.could he B had he Cdid he这里could不是情态动词,have不是助动词吗?为什么要用did?(答案选C)
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![I don't think he could have done such a stupid thing last night,__ A.could he B had he Cdid he这里could不是情态动词,have不是助动词吗?为什么要用did?(答案选C)](/uploads/image/z/7774627-67-7.jpg?t=I+don%27t+think+he+could+have+done+such+a+stupid+thing+last+night%2C__+A.could+he+B+had+he+Cdid+he%E8%BF%99%E9%87%8Ccould%E4%B8%8D%E6%98%AF%E6%83%85%E6%80%81%E5%8A%A8%E8%AF%8D%2Chave%E4%B8%8D%E6%98%AF%E5%8A%A9%E5%8A%A8%E8%AF%8D%E5%90%97%3F%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E7%94%A8did%3F%EF%BC%88%E7%AD%94%E6%A1%88%E9%80%89C%EF%BC%89)
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