英语 B1

4:29 知识点 1 现在完成时 vs 一般过去时 You know both doors from A2. B1 is where you stop knowing the rules and start choosing correctly under p… 4:44 知识点 2 现在完成进行时 The present perfect continuous is have been plus verb-ing, for an action that started in the past and is… 4:37 知识点 3 过去完成时 The past perfect is had plus the past participle, the tense for the earlier of two past events. When I a… 4:20 知识点 4 used to(过去的习惯) Some past habits are gone forever, and English has a form for exactly that: used to plus the base verb, … 4:12 知识点 5 将来时复习 You know the four doors from A2. B1 adds the rule that separates good English from translated Chinese: i… 4:37 知识点 6 条件句 If-sentences imagine worlds, and English has three. The verbs step backwards to show how real the world … 4:02 知识点 7 被动语态 Sometimes the thing that receives the action is the star. The active says the cat ate the homework; the … 4:36 知识点 8 间接引语 Direct speech quotes the exact words: she said, I am tired. Reported speech rebuilds the sentence: she s… 3:50 知识点 9 定语从句 A relative clause is a small sentence inside a big one, glued on with who, which, that, where or whose. … 4:44 知识点 10 动名词与不定式 When a verb acts like a thing, English gives it one of two costumes: the gerund, swimming, or the infini…