In French, when does one use "C'est" and when "Il/elle est"?

Question

I've found that a general rule is that "C'est" precedes a noun and "Il est" before an adjective, but is that true all the time (and is that wrong)?

Answer 1

Ithink it's right.
Normally we use C'est + article indéfini (un/une/des) + noun. Examples : C'est une chanteuse
Ce sont des étudiants. Etudiants is a noun.

You need to put adj after verb ETRE, examples :
Elle est étudiante. Here, étudiante is an adj, not a noun as the last example.
Il est fatigué. Fatigué is an adjective.

Answer 2

C'est is often used to denote something metaphysical and is often paired with an exaspiration:

C'est magnifique: It's magnificient.
C'est incroyable! It's incredible

While il/elle (he/it/she) combined with est is often used to denote something that describes the pronouns and their activities, etc. The use is more specific.

Il est mechant. - He is evil
Elle est medecin - She is a doctor.
Il est un chien - It is a dog.

Answer 3

cest which means it is, is for i think non living organisms(i cant remeber about plants) where as elle is feminin(female)and il is masculin(male)
cest une grande chambre
it is a big room
elle est dans la chambre
she is in the bedroom
il est dans la chambre
he is in the bedroom

Answer 4

c'est is like this is or that is or it's il est or elle est is like he or she is and i guess its true

Answer 5

thats wrong I think.

C'est is just for things and Il/elle est is for persons. Thats all.

Answer 6

C'est means "it is" Il est/Elle est mean "he is" or "she is"