Cycle1
Unit1 Am/is/are
Unit2 Present continuous
Unit3 Present simple
……
Cycle2
Unit31 May/might(possibility)
Unit32 Can/could/be able to(possibility and ability)
Unit33 Can/could/will/would(offers and requests)
……
Cycle3
Unit50 Should/ought/must/can't(probability)
Unit51 Can/could/may/need(requests and permission)
Unit52 Likes/dislikes/invitations
……
Cycle4
Unit66 Verbs not used In continuous tenses
Unit67 The passive
Unit68 Reporting the past
……
