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Table 3 Different Value Degrees of Modal Verbs

From: The SFL genre-based approach to writing in EFL contexts

Values

Modal verbs

High

must, should, ought to, need to, has to, is to

Median

will, would, shall

Low

may, might, can, could

  1. Note. The information is based on Halliday (1994, p. 362) and Tatsuki (2006, p. 76)