the tepptation to steal is greater than ever before.书上说是动词不定式做定语,但我还是不太懂这个to,专业术语不太懂,请高手给一个通俗易懂的说法,ever before也说一下吧,这个也没见过是temptation,我打错了,不好意思

tepptation不知道是什么东西,确定没有打错么.
the tepptation to steal is greater than ever before.=the tepptation which is / that is to steal is greater than ever before.
句子的主干是the tepptation is greater than ever before 那个……比以往任何时候都要大
现在这里the tepptation to steal =the tepptation which is / that is to steal
动词不定式形式是to do sth.
这里用动词steal的不定式,即 to steal 来作为定语,修饰前面的那个tepptation,表示是用于干……的那个tepptation, 要……的那个tepptation
动词不定式可以作为定语,来修饰前面的先行词的,如the pen to get is here 要拿的那个笔在这里
至于ever before一般是出现在比较级中 sth. is adj的比较级 than ever before
表示 ：比以往任何时候都要……, 程度比单单的before要加重了点~
动词不定式做定语