theenormousdeccsiontoundertakethisplanappearedtobepresentingitself这个句子里面~着手做这个巨大的决定·~为什么不是theenormousdecisiontobetundertook?后面thisplan.itself又做什么成分啊·~求告诉

Question

the enormous deccsion to undertake this plan appeared to be presenting itself
这个句子里面~着手做这个巨大的决定·~为什么不是the enormous decision to be tundertook?后面this plan .itself 又做什么成分啊·~求告诉

Answer 1

1.固定结构：the/a decision to do sth“做某事的决定”.
其用不定式的主动结构做后置定语,修饰前面的名称decision.
不定式做后置定语,经常可以用主动结构表示被动含义.
如：I want to find a room to live in.
何况,decision和undertake之间并不是被动关系,“被承担的决定”?
再如：I made a decision to study abroad.
2.this plan为不定式中动词undertake的宾语.
该句主干是：The enormous decision appeared to be presenting itself,是一个主系表结构的句子.
其中主语为the enormous decision,ennormous为前置定语修饰decision,而to undertake this plan为不定式做后置定语,也修饰decision.
该句谓语是一个系动词appear“似乎/好像”,其后to be prsenting itself为表语.