3.4　Annotation

“W ithin corpus linguistics，and more especially among computational linguists over the last two decades，ways of improving automatic word-class tagging as an essential prerequisite for further syntactic analysis has been a major preoccupation.”（Kennedy 2000：212）Considering the importance of annotation，the writer uses CLAWS（the Constituent Likelihood Automatic Word-tagging System）to have the corpus POS tagged^[1].CLAWS has been continuously developed since the early 1980s by UCREL at Lancaster，the accuracy ofwhich has reached 96%.(https://www.daowen.com)

The automatic grammatical tagging makes the POS search and analysis available.It“can provide information not only on whether an individual form occursmore often，say，as a noun or a verb，but tagging can also show the frequency and distribution of word classes in a corpus”（Kennedy 2000：102）.