Quello che/quelli che/ciò

Ciao ragazzi,

Hoping someone can help explain the subtle differences between “quello che/quelli che/ciò” I've seen these expressions a lot in written Italian and by listening to Italian audio. 

 If I'm not mistaken/understand correctly;

Quello che = that

Quelli che = those that

Ciò = thing/ Quello ciò = that thing.

I'm sure the words and meanings change depending on the context of a sentence, but just can't grasp the meaning of the above mentioned.

Mille grazie!

Quello che = the one that (this is the combination of "quello" + "che", "the one" + "that")
e.g.
- Voglio quello!
- Quale?
- Quello che vedi là!

- I want that one!
- Which one?
- The one you see there!
 

Quelli che = those that/the ones that  (this is the combination of "quelli" + "che", "the ones" + "that")
e.g.
- Non fidarti di quelli che dicono bugie.

- Do not trust those that tell lies.

The same goes for "Quella che" ( this is the combination of "quella" + "che", "the one" + "that").


Ciò = that/that thing ---- it could be replaced by "quello"
e.g.
- Non ho mai detto ciò.

- I have never said that.


Unfortunately, you would never use "quello ciò".

Hope this helps, but don't hesitate to let me know in case you have any other question! :)

Ciao Caterina,

Grazie tante per gli esempi! 

Michael.