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

　　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(dāng)形式主語(yǔ)或形式賓語(yǔ).one與that均無(wú)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(nèi)容或部分內(nèi)容,而one ／ones則不可以

　　where定語(yǔ)從句

　　where在定語(yǔ)從句中的用法

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

　　2.先行詞是表示抽象地點(diǎn)的如point,case,postion,condtion,activity,situation,job等,并作狀語(yǔ)用where引導(dǎo).

　　You reach a point where medicine cant help.你已到了藥物無(wú)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(chǎng)的工作.

　　判斷關(guān)系代詞與關(guān)系副詞

　　方法一： 用關(guān)系代詞，還是關(guān)系副詞完全取決于從句中的謂語(yǔ)動(dòng)詞。及物動(dòng)詞后面無(wú)賓語(yǔ)，就必須要 求用關(guān)系代詞。例如：

　�。ㄥe(cuò)） This is the mountain village where I visited last year.

　�。ㄥe(cuò)） I will never forget the days when I spent in the countryside.

　�。▽�(duì)） This is the mountain village (which) I visited last year.

　�。▽�(duì)） I'll never forget the days (which) I spent in the countryside.

　　習(xí)慣上總把表地點(diǎn)或時(shí)間的名詞與關(guān)系副詞 where, when聯(lián)系在一起。此兩題錯(cuò)在關(guān)系詞的誤用上。

　　方法二： 準(zhǔn)確判斷先行詞在定語(yǔ)從句中的成分(主、謂、賓、定、狀)，也能正確選擇出關(guān)系代詞/關(guān)系 副詞.先行詞在從句中作主、定、賓語(yǔ)時(shí)，應(yīng)選擇關(guān)系代詞；先行詞在從句中作狀語(yǔ)時(shí)，應(yīng)選 擇關(guān)系副詞。

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

　�。▽�(duì)）Is this the museum where the exhibition was held?

《定語(yǔ)從句》閱讀地址：http://www.osxg.com.cn/2022/0921/975302.htm