宾语从句的时态(1) 若主句是一般目前时、一般以后时或祈使句时，宾语从句依据句子的意义用需要的时态。如：We dont 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、过去以后时或过去完成时。如：He said: Im 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，则应使用一般目前时，不受主句时态的限制。如： Our teacher said that the earth moves round the sun.
