CEF Levels: Elementary / Pre-Intermediate
1 Direct v Indirect Speech, Part 1              3 Direct v Indirect Speech, Part 3
2 Direct v Indirect Speech, Part 2              4 Grammar Questions Basic

CEF Lelves: Pre-Intermediate / Intermediate
1 Shift of Pronouns, Part 1                     5 Shift of Tenses, Part 1
2 Shift of Pronouns, Part 2                     6 Shift of Tenses, Part 2
3 Shift of Adverbs, Part 1                      7 Shifts Mixed, Part 1
4 Shift of Adverbs, Part 2                      8 Shifts Mixed, Part 2

CEF Lelvels: Intermediate -- Advanced
1 Grammar Questions Advanced