Teachers often use this system to explain social functions like obligation, permission, and possibility (e.g., must vs. should ).
For many educators, the primary reference for this topic is Peter Master's textbook, Systems in English Grammar: An Introduction for Language Teachers , which uses a systematic, problem-solving approach to demystify grammar for non-native and future teachers. Core Systems of English Grammar Teachers often use this system to explain social
This includes the complex interplay of tense (time of action), aspect (the state of completion), and voice (active vs. passive). and possibility (e.g.
Views language as a resource for making meaning in real-world contexts. This approach asks "What is the speaker trying to achieve?" (e.g., apologizing, requesting, or suggesting). which uses a systematic