How is duplicitous used in a sentence?

'Whom' is used when you are referring to the object of the verb. 'Who' is used when you are referring to the subject of the verb.'Who is there?''Who broke that vase?''For whom is that parcel...

She's duplicitous: she can tell you that she loves you while she really hates you.

This complex sentence is hard to diagram.A description of a mental disorder could be characterized as a complex sentence.

(Get to means find a path or colloquially, a method to accomplish something.)"I could not find a way to get to the parade.""With luck, I will get to retire next year."

I have thought about this when conversing with people who consider English a second language. This awkward construction might be considered an idiom. It is commonly used but is not properly...