A1 - S 31 - The future with will

A1 - S 32 - The passive voice with a by-phrase

A1- S 33 - The past continuous and the simple past

A1 - S 34 - Modals should and could for advice and suggestions

A2 - S 1 - Gerunds as object of verbs

A2 - S 1 - Infinitives as objects of verbs

A2 - S 2 - Gerunds as objects of prepositions

A2 - S 3 - The present perfect for indefinite past times

A2 - S 4 - The present perfect vs the simple past

A2 - S 6 - The present perfect : for and since

A2 - S 7 - The present perfect : just, lately, recently, and still

A2 - S 7 - Would like and would rather

A2 - S 5 - The present perfect : already and yet

A2 - S 8 - The future with will

A2 - S 8 - The future with be going to, present continuous, or simple present

A2 - S 11 - Some and any

A2 -S 11 - A lot of, lots of, much, many

A2 - S 9 - The present real conditional

A2 - S 10 - The future real conditional

A2 - S 13 - Negative yes/no questions