(一)定语从句的结构：
在复合句中，修饰某个名词或代词的`句子(做这个名词或代词的定语)叫定语从句，定语从句一般放在被修饰的名词或代词后面，被修饰的名词或代词叫做定语从句的先行词，它与定语从句之间要有一个词连接，这个词指代先行词的内容叫做关系词(关系代词或关系副词：that,which,who,whose,when,where,why)。先行词在定语从句中充当主语，宾语，时间，地点，原因状语。
结构：先行词+关系词+定语从句。
eshesawawallofwaterthatwasquicklyadvancingtowardsher.
pan,someonewhoseesanotherpersonmakingthegesturewillthinkitmeansmoney.
meparkisacollectionofrides,exhibitionsorotherattractionsthatarebasedonacommontheme.
arkhasaconservationcenterthathelpsprotectmarineanimalsandtheirhabitatsintheriversandcoastalwatersofAsia.
torscangoonexcitingrideswheretheycanfeelwhatitisliketodothethingstheyhaveseentheirheroesdointhemovie.
hWinfreyisablackwomanwhoserisetofameisaninspiringstory.
(二)定语从句分为限定性定语从句和非限定性定语从句：
限定性定语从句：从句对先行词进行必要的描述或说明，缺少它，则句义显得不完整，从句与先行词紧密相连。
非限定性定语从句：对先行词进行补充说明，解释，它与先行词之间有逗号隔开。
reshecouldmove,sheheardaloudnoise,whichgrewtoaterribleroar.
aftertreewentdown,cutdownbythewater,whichmusthavebeenthreemetersdeep.
a,whosebeautifulhairanddresswereallcoldandwet,startedcrying.
rtalkincludesrhythmandrhymingwordsaswellastonguetwisters,whichoftenmaketheaudienceapplaud.
(三)关系词前面可以根据定语从句的内容加上一些介词，这些关系词在介词后面常用which或whom.
ewasamanwithwhomIwouldhavetoworktogetherandfinallythemanagerofthecompany. peoplewhosawthefilmwereafraidtoswimintheseawhentheyrememberedthescenesinwhichpeoplewereeatenbytheshark.
