complex sentence (oración compleja)
complex sentence
una oración formada por una cláusula independiente y al menos una cláusula dependiente, a menudo unidas con because, although o when.
Ejemplo
Although the plan is costly, it will save lives. (Although the plan is costly no puede estar sola.)
En inglés
complex sentence — a sentence made of one independent clause and at least one dependent clause, often joined by because, although or when.
Although the plan is costly, it will save lives. (Although the plan is costly cannot stand alone.)