关于句子成分剖析的请教

An excess of house plants in a small apartment can be oppressive.在一套狭小公寓里放过多的室内植物会给人压抑感。

请问各位老师，假如对这个句子进行成分剖析，can是助动车，be是系动词，oppressive是表语，An excess of house plants in a small apartment是主语。其中of house plants和 in a small apartment分别做An excess的后置定语，对吗？

 

其他剖析都对。这个剖析错误：of house plants和 in a small apartment 分别做An excess的后置定语。
改为：
in a small apartment 作  house plants 的定语。然后 of house plants in a small apartment，作An excess 的定语。