The real learning of phonetic symbols is in the first grade (seventh grade) of junior high school. When children go to junior high school, they can sign up for an excessive English class-specializing in phonetic symbols. The sixth grade of primary school will involve some grammar knowledge, such as verb past tense, sentence general future tense, general present tense and general past tense. These typical sentence patterns don't involve much, but it doesn't matter. You can master them by listening attentively.