If participants have been studied in this way for a long time to be able to use language to convey meaning, because it is an opportunity to practice using the language in realistic conditions.
If a student has learned in this way for a long time. I can use language to convey meaning. I had the opportunity to practice the language in the actual situation.
If the learners to learn this way for a long time. Will be able to use the language in communication. Because of the opportunity to practice using the language in the condition is true.