高一英语情态动词
判断正误
1Theyoughttohelpthatoldlady,oughtn'ttothey?
2Youdon'thavetocomeifyoudon'twantto.
3Butfortheheavyrain,theyoughttoarriveearly.
4Wehavenottohandinthepaperrightnow.
5Hedoesn'thavetoworksolateatnight.
6Theymustn'thavetoldthebadnewstothegirlbecauseshelookedhappy.
要说明原因谢谢