@dalehileman,
Quote:Some constructions are more colloquial than others. In accordance with the general principle that nothing is entirely anything while everything is partly something else, you can't draw a line where everything to the left is colloquial and to the right, not
I understand where you are coming from, Dale, and your point is well taken. But it's not the constructions themselves that are colloquial or not colloquial for we most assuredly use every grammar structure available to us in everyday/ colloquial language.
When we look at the example under discussion, below,
I have come across a wallet and have given it to the police.
it's apparent that both the present perfect form and the simple past can be used in the same situation. This is an example of speech that is very much colloquial.
Colloquial speech isn't just 'hafta', 'gonna' and the like. There is much formality in everyday speech. We switch with such rapidity that it is mind boggling to analyse.
Also, since the present perfect is used to say things that are not always related to formality, ie. current relevance/hot topic/past action that's important to now, cf.
The president has been shot,
The stock market has dropped ... ,
Mom, Billy has worn my sweater, again!,
it's not appropriate/accurate to describe this as a colloquial/formal dichotomy.
I think that's what you did, did you not?