2022考研的小伙伴们，在面对考研英语长难句时是否感觉无从下手，长难句要想取得首先要打下坚实的词汇基础，其次还要学会从语法的角度对句子进行分解，文都考研为大家精选了历年考研试题中的长难句，一起来看吧~


>>2022考研英语长难句练习汇总
 

Rats have been shown to engage in multiple forms of reciprocal help and cooperation, including what is referred to as direct reciprocity—where a rat will help another rat that has previously helped them.

【结构分析】

主干部分：

Rats have been shown to engage in multiple forms of reciprocal help and cooperation

修饰成分：

including……为伴随状语;

what is referred to as direct reciprocity为动名词including后的宾语从句;

where a rat will help another rat为定语从句修饰direct reciprocity;

that has previously helped them为定语从句修饰another rat;

【译文】

有研究表明，老鼠会进行多种多样形式的互助及合作，其中包括被称为直接互惠的行为，即老鼠会帮助曾经帮助过自己的另一只老鼠。