Among the elements that are demarcated by this punctuation mark, now represented by the comma, the period composed by subordination is emphasized. Given the particularities inherent to grammatical postulates, the article in question is guided by highlight the cases considered as an exception and, above all, those in which such linguistic occurrence is manifest. Therefore, let's see:
* Subordinate substantive clauses
It is not recommended to use a comma between the noun and the main clause.
Examples:
We hope | that you agree with our ideas.
Or. direct objective noun
I need | that you understand me.
Or. nominal complete noun
However, when it comes to positive subordinates, it is necessary to use this one.
Example:
There is a regulation in life that we cannot help but be happy.
Or. apositive noun.
* Subordinate adjective clauses
Do not stop now... There's more after the advertising ;)
Restrictive subordinate clauses are not delimited by a comma.
Example:
The boys |who won the Olympics | were awarded.
Or. restrictive adjective
Subordinate explanatory adjectives are preceded by the use of a comma.
Example:
Macunaíma, |who is considered the national hero, |is a character in a literary work.
Or. explanatory adjective
Adverbial subordinate clauses
* It is not mandatory, but it is recommended to use the comma between subordinate adverbials and the main clause.
Example:
As it was raining a lot at that moment|, we decided not to proceed.
Or. causal adverbial
* If the subordinate clause comes after the main clause, the use of a comma is unnecessary.
Example:
Everyone was surprised | When we arrive.
Or. temporal adverbial
By Vânia Duarte
Graduated in Letters
Brazil School Team
Grammar - Brazil School
Would you like to reference this text in a school or academic work? Look:
DUARTE, Vânia Maria do Nascimento. "The use of the comma in subordinate clauses"; Brazil School. Available in: https://brasilescola.uol.com.br/gramatica/o-uso-virgula-nas-oracoes-subordinadas.htm. Accessed on June 27, 2021.