I often have problems to choose the right determiner when a sentence should start with
This. I know the rules when we are talking about physical things but as a non-native, I have a hard time to understand which determiner to use in case of abstract (I don't even know if it is the right term) things. I mean the things by which is hard to say how far are from us.
For example, when I'm talking about some phone that is far from me. I would say:
That is the phone with a color display.
It is ok and completely understandable.
But I have a problem in following cases:
The more things you will have, the more will suffer your back.
Thisis particularly relevant for small man who doesn't have so much strength in their muscles.
Mobile phones allow you to make a call when you need to.
Thisis feature gives you the opportunity to accomplish more things at the same time.
Which determiner is better to use and why? Also, some resources on this topic would be very helpful.