"Total Recall" course
Pool of topics with exercises
Past modals – Exercise 518
Right or wrong? Pay attention to the
She must had studied very hard.
Past modals — making
Modal = should / could / might / must / would
modal + have + past participle
# He must have overslept.
modal + not + have + past participle
# You wouldn't have believed me.
modal + subject + have + past participle
# Should I have warned them?
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