Discourse markers are formal reflection of metacognition in the monitor adjustment process.Like "how to say" and "to put it this way",they also reflect speaker's metacognition in the monitor adjustment process.Generally speaking, "how to say" reflects speaker's hesitant attitudes in the process of metacognition monitor adjustment,while "to put it this way" reflects speaker's inclination of explaining.However,they can be integrated.In the metacognition monitor adjustment process existing both hesitation and willingness of explanation,...