HomeGrammarModals of DeductionModals of Deduction admin 28 January 2017 Grammar No Comments Modals of DeductionCertain, possibly true, not true. Must have + past part, may/might/could have + past part and etc… Follow the list; Tweet Pin It Related Posts Uses of Wishes With Tenses 24 Most Important Prepositions with Using and Examples The Most Frequently Used Collocations in EnglishAbout The Author admin