Adverbial clauses are used to explain the purpose of an action, describe its consequence or outcome, or provide the cause or justification for it. These clauses play a crucial role in sentences, helping readers or listeners better understand the context and logic of actions.

This grammar mind map organizes past tense concepts: Past Continuous explains "was/were+doing" for interrupted actions; Time Markers section defines when/while/as usage; Past Simple contrasts regular/irregular verbs with timeline illustrations. The Structure branch provides affirmative/negative/question transformation formulas, highlighting common errors like confusion with Present Perfect. Color-coded sentence diagrams compare tense applications in narrative contexts.