主句用過去式時從句用相應的過去時態 是怎麼個相應法啊?

題目：

主句用過去式時從句用相應的過去時態 是怎麼個相應法啊?

解答：

你問的是賓語從句的語法嗎?在直接引語改爲間接引語（即賓語從句）時,主句如果是過去時,從句一般要改成相應的過去時態.相應法如下：
一般現在時——一般過去時：She said,"I am fifteen."    
                                             She said that she was fifteen.
現在進行時——過去進行時：He told us,"They are watching TV."  
                                             He told us that they were watching TV.
現在完成時——過去完成時：Mr.Li said,"I have been to Canada."
                                                     Mr.Li said that he had been to Canada.
  4.   一般將來時——過去將來時：She said,"We will visit our grandparents."
                                                     She said that they would visit their grandparents.
  5.  一般過去時——過去完成時：The boy said,"I saw the strange man."
                                                     The boy said that he had seen the strange man.
 
過去進行時不改,過去將來時不改,過去完成時不改.
如果從句爲客觀真理,用一般現在時,不改.