How can impinge be 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...

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."

Had= past tensehas= present tensehave= future tense

A good design should never unduly impinge upon or detract from the performance.