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Lesson Plan: “Might Have,” “Should Have,” and “Must Have” English

This lesson plan includes the objectives, prerequisites and exclusions of the lesson teaching students how to use “might have,” “must have,” and “should have” to talk about making choices in the past.

Objectives

Students will be able to

  • use “might + have + past participle” in the affirmative, negative, and interrogative forms to talk about possibility in the past based on information they have,
  • use “must+ have + past participle” in the affirmative and interrogative forms to talk about things that they are sure happened in the past based on information they have,
  • use “should + have + past participle” in the affirmative, negative, and interrogative forms to talk about recommendations and regret in the past and the availability of a better option,
  • understand that using the negative form of “should have + past participle” shows that an action did happen but a better option was available at the time,
  • understand that using the positive form of “should have + past participle” shows that an action did not happen in the past.

Prerequisites

Students should already be familiar with

  • modal verbs,
  • the past participle,
  • the adverbs maybe, probably, and definitely.

Exclusions

Students will not cover

  • could(n’t)/can’t have,
  • closed questions with might(n’t) have and must(n’t) have,
  • mustn’t/must not have,
  • continuous tenses.

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