Modals in present tense : I should go, Students must study for their tests , May I sit here?, She can't swim very well, They might go to Brazil next semester , Modals in past tense : Mary couldn't go with us , you must have been scared!, We had to take our drinks to go. , they didn't need to move right away, He could run for miles. He's too old now ,

Modal verbs tenses

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