You're having a meeting with your coworker Brenda in her office. You think of a question that you want to ask another coworker, Amy, about, so you call Amy from Brenda's telephone. When Amy answers, you say:
Hi Amy. This is Zack.
demonstratives, introductions, phone, telephone 
You're trying to sell your motorcycle. You're negotiating with someone who might buy it. You've offered to sell it to them for $7,500, but they're asking for a lower price. You don't want to sell it for less than that amount, so you say:
That's as low as I'm willing to go.
demonstratives, negotiation, price, selling You want to buy a new phone. You're trying to explain to your husband why you want a new one. You say:
This one is ancient!
You're at a video rental store with your children. You told them they could choose a video to rent, but they picked out a violent horror movie. You want to tell them that they can't watch the movie. And you want to say it in a way that sounds adult, so that your children don't think that you're talking down to them. You say:
That one's not appropriate for children.
