He did very badly on the exam. He ___harder.A.must study B.must have studied C.should study D.should have studied本题答案选D,AC为什么错误呢,不能表示之后他必须或者应该好好学习吗?肯请老师解答,感谢!
Blue, with its intimations of the Virgin Mary, constancy and
faithfulness, symbolized femininity.这里的constancy
and faithfulness是修饰Virgin Mary还是Virgin
Mary, constancy and faithfulness修饰intimations?如何分析?
He first told police his son disappeared while the family was picking vegetables.请问 while 从句是修饰 disappeared 还是 told?如果修饰disappear 如何 改为修饰 told?如果修饰told 如何改为修饰 disappear?