Section_ⅢGrammar—didn’tneedtodo和needn’thavedone语法图解1探究发现①Ididn’tneedtogetavisa.②ItwasaninformalpartysoIdidn’tneedtowearasuit.③Youneedn’thavespokensoslowly.④Youneedn’thavewateredtheflowers,forit’sgoingtorain.⑤Youneedn’tworryaboutsituationsliketheseifyouhavegoodsocialskills.2⑥—NeedIdothehomeworkfirst?—Yes,youmust./No,youneedn’t/don’thaveto.⑦IneedtoknowwhatIcantal...
