Based on corpora CLEC and LOB, by using Contrastive Inter language Analysis, this study analyses the difference of the use of modal verbs between Chinese English learners and native learners.

To encourage more passengers to use west rail, the tac considers that KCRC should work out arrangements with other transport operators to provide inter - modal concessions.

For Inter-MB, a temporally statistical modal with regard to vector angle was established and the moving object was detected by using the neyman-pearson criteria.