From which stage do learners start to express opinions in longer sentences?

Learners begin to express opinions in longer sentences during the Intermediate Proficiency Stage. At this stage, learners have acquired a sufficient vocabulary and grammatical structure that enables them to engage more fully in conversation. They can not only produce longer, more complex sentences but are also starting to navigate discussions around more abstract topics, including expressing their opinions and thoughts in a coherent manner.

In contrast, during the Silent/Receptive Stage, learners may not yet be verbalizing or producing language, as they are primarily absorbing language input. The Early Production Stage is characterized by short phrases and single words. In the Speech Emergence Stage, learners might communicate in longer sentences, but these tend to be simple and often lack depth regarding opinion expression. Therefore, the Intermediate Proficiency Stage is the point where learners effectively articulate more nuanced opinions and connect their ideas in detailed sentences.