combined sentences

Could you please check the following sentences?

A good language learner has a good self-image and self -confidence. This sentence is OK.

"self-image" is C but self confidence is U. What do C and U mean?


How can I combine it?

Hello dear teacher,
by C I mean countable and by U I mean Uncountable.I mean regarding writting rules Can I combine two different types of noun at the smae time in the sme sentence?

in 2#: Imagine you wish to describe your favorite city for the sake of repetition you want to use good" with three different nouns .What can I do?

Regards

I guess C is used for countable noun and U is for uncountable noun here. If it is true then it is possible to combine countable noun and uncountable noun in a sentence. Your sentence is a good example.

I mean regarding writing rules, can I combine two different types of noun at the same time in the same sentence?— Yes, but you should pay attention to word order in order to make it clear: A good language learner has self-confidence and a good self-image.

in 2#: Imagine you wish to describe your favorite city for the sake of repetition you want to use good" with three di

Thanks for swift reply,What do you mean by "different gramatical relationship wiyh subject"?Would you please explain more?

Regards

I am in Cairo. It is a good place. It is nice weather today.

It is nice weather today. = The "it" is a dummy it. Grammatically it has no antecedent.
It is a good place. = The 'it" does have an antecedent = the place that you have mentioned before (Cairo).