Abstract ] the verb in modern Chinese word class system plays an important role in the daily life of a wide range, while in the teaching of Chinese as a foreign language is also a difficult point. Thailand students in the use of Chinese verbs can often occur when the use of errors. In order to let the Thai students better faster master the Chinese modal verbs, this paper of predecessors of a series of Chinese as a foreign language can wish verbs were collated and summarized, in the empty kamphaeng PHET stay school board as an example, mainly to Thai students in everyday life, often use can wish verbs "to", "may", "to be" and "will" of analysis of Thai students of elementary Chinese modal verb errors, identify modal verbs used types of errors, and analyze the errors, and puts forward some teaching suggestions. I hope to improve the teaching efficiency of Chinese to foreign language.