Both"expectation/anti-expectation markers"and"expectation/anti-expecta-tion triggers"are terms that characterize predictability,but there are important differences between them.This paper argues that yibanshuolai(一般说来)is an expectation trigger with occasional counter-expectation examples,while anshuo(按说)is an anti-expectation trigger with occasional expectation examples.Then,a comparative study is made of their discourse configurations to find out the similarities and differences between expectation and anti-expectation triggers.Anshuo is mainly used for backtracking and occasionally for asser-tion;yibanshuolai is basically used for assertion.The pragmatic differences between the two are derived from the cognitive differences between rationality and conventionality.
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