中考网整理了关于2021年中考英语知识点之带to的情态动词,希望对同学们有所帮助,仅供参考。 带to 的情态动词 带to 的情态动词有四个:ought to, have to, used to, be to, 如加上have got to (=must), be able to,为六个。 它们的疑问、否定形式应予以注意: Do they have to pay their bill before the end of the month? 他们必须在月底前付帐单吗? She didn't use to play tennis before she was fourteen.在她十四岁前,她不会打网球。 You ought not to have told her all about it.你不应该告诉他所有这件事。 Ought he to see a heart specialist at once.? ought to 本身作为情态动词使用。其他的词作为实义动词使用,变疑问,否定时,须有do 等助动词协助。 (责任编辑:admin) |