定語從句

　　V.one一般有前置修飾語,有時也可有后置修飾語或不用修飾語.而 that不能有前置修飾語,但可有后置修飾語.

　　Cook was a strict but good captain,one who took good care of his sailors.

　　The water in the well is cleaner than that in the river.

　　VI.it可以替代句中的不定式或從句等,充當形式主語或形式賓語.one與that均無此用法.

　　It is known to everybody that the moon travels around the earth once every month.

　　I found it hard to get on with her.

　　VII.it與that均可以替代上文全句的內容或部分內容,而one ／ones則不可以

　　where定語從句

　　where在定語從句中的用法

　　1.先行詞表示具體地點的,并在在定語從句中做狀語的（不做主語,表語和賓語）,用where引導定語從句.例如：this is the house where i once lived.

　　2.先行詞是表示抽象地點的如point,case,postion,condtion,activity,situation,job等,并作狀語用where引導.

　　You reach a point where medicine cant help.你已到了藥物無法治療的地步.

　　Its put me in a position where I cant afford to take the job.這使我陷入一種不能接受此工作的境地.

　　She wants a job where her management skills can be put to good use.她想找一份能將她的管理技能派上用場的工作.

　　判斷關系代詞與關系副詞

　　方法一： 用關系代詞，還是關系副詞完全取決于從句中的謂語動詞。及物動詞后面無賓語，就必須要 求用關系代詞。例如：

　　（錯） This is the mountain village where I visited last year.

　　（錯） I will never forget the days when I spent in the countryside.

　　（對） This is the mountain village (which) I visited last year.

　　（對） I'll never forget the days (which) I spent in the countryside.

　　習慣上總把表地點或時間的名詞與關系副詞 where, when聯系在一起。此兩題錯在關系詞的誤用上。

　　方法二： 準確判斷先行詞在定語從句中的成分(主、謂、賓、定、狀)，也能正確選擇出關系代詞/關系 副詞.先行詞在從句中作主、定、賓語時，應選擇關系代詞；先行詞在從句中作狀語時，應選 擇關系副詞。

　　例如：（對）Is this the museum which you visited a few days ago?

　　（對）Is this the museum where the exhibition was held?

《定語從句》閱讀地址：http://m.osxg.com.cn/2022/0921/975302.htm