语法 > 中阶1
- 表推论的情态动词 Modal verbs of deduction – must, may, might, could, can’t
- 主动和被动语态 Active and passive voice
- 动词的被动形式 Passive verb forms
- 通常,曾经,习惯 usually, used to, be used to, get used to
- 一般过去时,过去进行时,过去完成时 Past simple, past continuous, past perfect »
- ed/ing形式的形容词-来自于动词 -ed/-ing adjectives – adjectives from verbs
- 反身代词——我自己,你自己 Reflexive pronouns – myself, yourself
- 义务,禁止,必要性,建议 have to, must, should – obligation, prohibition, necessity, advice
- 可以——能力和可能性 Can, could, be able to – ability and possibility