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　　2. 当主句谓语动词是hope，wish，decide，forget，plan，agree等，且主句主语与从句主语相同时，从句可简化为不定式结构。如：

　　She agreed that she could help me with my maths. →She agreed to help me with my maths.

　　3. 在连接代词/副词引导的宾语从句中，当从句主语与主句主语或间接宾语一致时，宾语从句可简化为“连接代词/副词+不定式”结构。如：

　　Can you tell me how I can get to the station?→Can you tell me how to get to the station?

　　宾主从句的时态变化

　　(1) 若主句是一般现在时、一般将来时或祈使句时，宾语从句根据句子的意义使用需要的时态。如：

　　We don’t know who has broken the window. But we will find out who has done that.

　　Please tell me where we will go.

　　(2) 若主句是一般过去时，宾语从句要用相应的某种过去时态，如一般过去时、过去进行时、过去将来时或过去完成时。如：

　　He said: I’m a student. ----- He said that he was a student.

　　The teacher asked: What is Mike doing? ----- The teacher asked what Mike was doing.

　　(3) 若宾语从句叙述的是客观真理或永恒不变的规律，则应采用一般现在时，不受主句时态的限制。如： Our teacher said that the earth moves round the sun.

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