B1 practice with the past perfect simple and continuous in past narratives, experiences, causes, results, and unreal situations.
Exercises
Transparent Idioms Exercise
C2 Transparent Idioms Exercise
Even If Clauses Exercise
CEFR B2; focus: even if clauses expressing concession or hypothetical contrast.
Present Simple Negatives Exercise
A1 practice with negative forms of present simple verbs and be.
Tentative Academic Claims Exercise
CEFR C1; focus: hedging, cautious inference, and qualified academic claims.