1. A grammatical clause that cannot stand alone as a complete sentence and functions as a dependent clause within a complex sentence, typically introduced by a subordinating conjunction or relative pronoun
In the sentence 'I will go to the party if I finish my work,' the phrase 'if I finish my work' is a subordinate clause.
Na frase 'Vou à festa se terminar meu trabalho', a frase 'se terminar meu trabalho' é um caso subordinado.
2. A clause that depends on a main clause to express a complete thought
The subordinate clause 'when the sun rises' modifies the main clause in 'We will start our journey when the sun rises.'
O caso subordinado 'quando o sol nasce' modifica a oração principal em 'Começaremos nossa jornada quando o sol nasce.'