第四层次是控制（Control）。控制下的语言使用和自发性的语言使用是

The fourth level is Control. There is a difference between controlled language use and spontaneous language use. Spontaneous language use refers to the learner's unconscious language exposure, which is an effortless language use. However, controlled language use is a conscious use of language when the learner's attention is drawn. It is a language expression that requires the learner's effort.

The fourth level is Control. There is a difference between controlled language use and spontaneous language use. Spontaneous language use refers to learners in the unconscious, the natural language surface, is an effortless language use. However, controlled language use is the case of attracting the attention of learners, learners consciously use language, is the need for learners to spend effort on language expression.

The fourth level is control. There is a difference between controlled language use and spontaneous language use. Spontaneous language use is a kind of effortless language use, which refers to the spontaneous language expression of learners in the unconscious situation. However, controlled language use refers to the conscious use of language by learners when they arouse learners' attention. It is a kind of language expression that requires learners' effort.<BR>