• Practice exercises Decide on an appropriate past modal verb and the correct form of the verb in brackets to finish the sentences. There may be more than one correct answer.
  • Fiona Aish & Jo Tomlinson




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    Grammar for IELTS - Collins English for Exams

    Didn’t have to is used to express that something was not an obligation
    I did n ’t have to go to w o rk when I was a child.
    Note: Must cannot be used in the past to express an obligation or choice.
    Modal Verbs used for past regrets:
    Should is used to express a recommendation or regret in the past 
    should + have + past participle (Also should + have + been + verb(-/ng)l
    We should have gone on that Eco tourism trip. I’m sorry that we didn’t, (we didn’t go and I regret it] 
    We shouldn't have gone on that Eco tourism trip. It was expensive and dull, (we went and I regret it)
    Ought to is also used to express a recommendation o r regret in the past 
    ought to + have + past participle (Also ought to + have + been + verb(-/ng))
    We ought to have thought more about the planet before using so much fuel.
    This construction is less common in the negative.
    Practice exercises
    Decide on an appropriate past modal verb and the correct form of the verb in brackets to
    finish the sentences. There may be more than one correct answer.

    When fossil fuels were discovered, p e o p le ____________ [know] the negative effects
    they w ould eventually cause as no research had been done on them .

    In early civilisations, p e o p le ____________ [hunt] fo r th e ir own meat.

    P eople_____________[take] more care of endangered species. Over a hundred species
    have become extinct in the last 50 years and it’s a te rrib le shame.
    U I t _____________ [be] d iffic u lt to survive in the days before m odern m edicine and
    hygiene standards.
    5 A new lizard has been discovered in the rainforests of Sum atra. Some experts say they 
    [inhabit] the deeper rainforests fo r up to a m illio n years.

    P e o ple _____________[travel] across borders quite easily in the past. Nowadays there
    are many more im m igration rules.

    Before organised form s of rule such as kingdom s or governm ents, people 
    [pay] taxes.
    8 Resentm ent among the c itiz e n s _____________ [develop] fo r a long tim e before the
    overthrow of the Empire, because popular support fo r a revolt had been growing fo r
    decades.

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