Unit 2: am/is/are (questions)
Unit 3: I am doing (present continuous)
Unit 4: are you doing? (present continuous questions)
Unit 5: I do/work/like etc. (present simple)
Unit 6: I don’t … (present simple negative)
Unit 7: Do you … ? (present simple questions)
Unit 8: I am doing (present continuous) and I do (present simple)
Unit 13: I was doing (past continuous)
Unit 15: I have done (present perfect 1)
Unit 16: I’ve just … I’ve already … I haven’t … yet (present perfect 2)
Unit 17: Have you ever … ? (Present Perfect 3)
Unit 18: How long have you … ?
Unit 20: I have done (present perfect) and I did (past)
Unit 21: is done was done (passive 1)
Unit 22: is being done / has been done (passive 2)
Unit 23: be/have/do in present and past tenses
Unit 24: Regular and irregular verbs
Unit 25: What are you doing tomorrow?
Unit 31: must mustn’t don’t need to
Unit 34: Would you like … ? I’d like …
Unit 35: Do this! Don’t do that! Let’s do this!
Unit 37: there is there are
Unit 38: there was/were there has/have been there will be
Unit 40: I am, I don’t etc.
Unit 41: Have you? Are you? Don’t you? etc.
Unit 42: too/either so am I / neither do I
Unit 44: is it …? have you …? do they …? etc. (questions 1)
Unit 45: Who saw you? Who did you see? (questions 2)
Unit 46: Who is she talking to? What is it like? (Questions 3)
Unit 47: What …? Which …? How …?
Unit 48: How long does it take …?
Unit 49: Do you know where…? I don’t know what… etc.
Unit 50: She said that … He told me that …
Unit 51: work/working go/going do/doing
Unit 55: go to … go on … go for … go -ing
Unit 59: I/me he/him they/them etc.
Unit 60: my/his/their etc.
Unit 62: I / me / my / mine
Unit 63: Reflexive Pronouns
Unit 66: Introduction to Algorithms and Programming
Unit 72: Expressing Likes and Dislikes
Unit 74: Introduction to Algorithms and Programming
Unit 75: Using One and Ones
Unit 77: Expressing Zero Quantity with No, None, and Not Any
Unit 83: I Need to Do / I Have to Do
Unit 85: old/nice/interesting etc. (adjectives)
Unit 96: Nouns and Adjectives
Unit 97: and but or so because
Unit 101: Introduction to programming
Unit 102: Present Perfect and Past Simple
Unit 103: at 8 o’clock on Monday in April
Unit 107: I, Me, My, Mine, and Myself
Unit 111: Reported Speech
Unit 114: go in, fall off, run away etc. (phrasal verbs 1)