Modals – Necessity On May 12, 2012 / In Grammar 66 Views How to use must, have to, and have got to.More Modals Videos and Activities – Click HereRelated posts:Modals- Certainty / Past NegativeAdjective Clause Practice QuizOne Minute Grammar - The Past Progressive modal forms, modals Post navigation Prev PostGerunds and Infinitives – Object of the Preposition Next PostBest iPad Apps for ESL Teachers #9 – VoiceThread