定语从句作文怎么写【一】
一般说来，用on和at表示“as soon as, once”。on后面常接“来、去”之类的词，at后面常接“听到、看到”之类的词。in后面接其他带动作的词，相对于从属连词“while”。
例1：On removing them he was stunned to see that the plates were fogged where the crystals had covered them.当他把晶体揭开时，发现盘子上方雾蒙蒙，他吃了一惊。
例2：In running down the stairs, I heard the clock struck twelve.
我在跑下楼的时候，听见钟敲了十二下。
例3：He jumped with joy at hearing the news.他一听到这个消息就高兴得跳了起来。
定语从句作文怎么写【二】
当which引导的定语从句指代主句全部内容时，可以把which改为it，作形式主语，把原来的主句改成正在主语。或者把定语从句的整个信息改换为名词短语作主语，使原来的定语从句变成简单句。
例4： He indulges himself all day in computer games, which makes his parents extremely sad.
改为：It makes his parents extremely sad that he indulges himself all day in computer games.
他整天沉湎于电脑游戏，这使他父母伤心至极。(主语从句
或者：His indulgence in computer games all day makes his parents extremely sad. (名词短语
定语从句作文怎么写【三】
1.从句为陈述句，常选择引导词that，that引导宾语从句无意义，不充当句子成分常省略。例句：He told us (that they would help us through the whole work.
2.从句为一般疑问句，常选择引导词if或whether，表示“是否”。在whether … or not结构中不能用if替换。例句：I don’t know if there will be a bus any more.
3.从句为特殊疑问句，常选择what,when,where,which,who,how等的疑问代词、副词作引导词。例句：He didn’t tell me when we should meet again.
定语从句作文怎么写【四】
介词短语替代定语从句有两种方式：(1省略“关系副词+主语+be动词”，或“关系代词+be动词”;(2根据从句的意思改编。
例1：We have never forgotten the days (when we were at college.
我们从来没有忘记在大学对书的日子。
例2：I don’t know the person (who is in your office.
在你办公司的那个人我不认识。
例3：Those who have high expectations but do not have those relationship skills are likely to be brought down to earth fairly quickly as their Prince or Princess Charming falls off their pedestal.
改为：Those with high expectations but without those relationship skills are likely to be brought down to earth fairly quickly as their Prince or Princess Charming falls off their pedestal.
那些对婚姻期望太高却又不具备处理婚姻关系技巧的人，一旦他们心中的白马王子或白雪公主从神圣的光环里跌落，他们就会很快地回到现实中。
例4：He is not a person who likes to haggle over every ounce.
改为：He is a person above personal interests.
他不是一个斤斤计较的人。
定语从句作文怎么写【五】
1.Theplace_______interestedmemostwastheChildren'sPalace.
A.WhichB.whereC.whatD.inwhich
2.Doyouknowtheman_______?
A.whomIspokeB.tow
hospokeC.IspoketoD.thatIspoke
3.Thisisthehotel_______lastmonth.
A.whichtheystayedB.atthattheystayed
C.wheretheystayedatD.wheretheystayed
4.Doyouknowtheyear______theChinesewasfounded?
A.whichB.thatC.whenD.onwhich
5.Thatistheday______I'llneverforget.
A.whichB.onwhichC.inwhichD.when
6.Thefactory______we'llvisitnextweekisnotfarfromhere.
A.whereB.towhichC.whichD.inwhich
7.Greatchangeshavetakenplacesincetheninthefactory_______weareworking.
A.whereB.thatC.whichD.there
8.Thisisoneofthebestfilms_______.
A.thathavebeenshownthisyearB.thathaveshown
C.thathasbeenshownthisyearD.thatyoutalked
9.Canyoulendmethebook______theotherday?
A.aboutwhichyoutalkedB.whichyoutalked
C.aboutthatyoutalkedD.thatyoutalked
10.Thepen______heiswritingismine.
A.withwhichB.inwhichC.onwhichD.bywhich
11.Theyarrivedatafarmhouse,infrontof______satasmallboy.
A.whomB.whoC.whichD.that
12.Itthereanyoneinyourclass______familyisinthecountry?
A.whoB.who'sC.whichD.whose
13.Iwanttousethesamedictionary______wasusedyesterday.
A.whichB.whoC.whatD.as
14.Icanneverforgettheday_______weworkedtogetherandtheday______wespenttogether.
A.when;whichB.which;whenC.what;thatD.onwhich;when
15.Thisisthereason______hedidn'tcometothemeeting.
A.inwhichB.withwhichC.thatD.forwhich
16.There’relotsofthings_____IneedtodobeforeIleave.
A．thatB.whoC.whyD.what
17.Doyouliketheredcar______wasmadeinTianjin?
A.whereB.whoC.whichD.when
18.--Doyouknoweverybody______cametotheparty?
--Almost,butIdon’tknowtheone______youtalkedwithnearthedoor.
A.who,/B.whose,thatC.that,whichD./,whom
19.Thisisall_____Iknowaboutthematter.
A.thatB.whatC.asD.whether
定语从句作文怎么写【六】
同上面一样，At基本上后接sound，sight“听到、看到”之类的词；on接“回来、到达”之类的词；用in，during表示“when, while”；用over表示“while”之意。当然，这一切都是相对的分类。
例1：The little girl passed out at sight of a snake.小女孩一看到蛇就昏过去了。
例2：In our hurry to get from one place to another, we failed to see anything on the way.当我们急急忙忙从这儿到那儿的时候，一路上什么也没有看见。
例3：On arrival at the railway station, he found the train had already left.当他到达火车站的时候，他发现火车已经开走了。
例4：He had intended to go, but on second thoughts, he gave up the idea.
他本来想去，但进一步考虑后,打消了这个念头。
例5：During my absence, would you please take care of my cat?
在我不在的时候，请帮我照看一下猫，好吗？
例6：He fell asleep over a book.他看书的时候睡着了。
例7：After reelection he announces that he will not help.经过一番考虑后，他宣布将不提供任何帮助。
例8：After graduation, he went to America for his PhD studies.毕业之后，他去了美国攻读博士。
