Unit1:Auxiliary verbs: do, be, have
Present Simple and Present Continuous
Present Perfect Simple and Past Simple
Phrasal verbs
Unit2:Defining relative clauses
The passive
Past Simple and Past Continuous
Unit3: Future plans
Comparatives and superlatives
Future possibility
Unit4: Question tags
Modals of obligation and prohibition
Zero and First Conditional with if/when/unless/ as soon as