Grammar in use初级Past_2

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Grammar in use初级 Past_2

• {10} was/were
• {11} worked/got/went etc.(past simple)
  • The past simple is often -ed, Spelling(→ Appendix 5)，some verbs are irregular(→ Appendix 2-3)
• {12} I didn't... Did you...?(past simple negative and questions)
  • do/does → did
  • did/didn't + infinitive
  • Questions
  • Short answers
• {13} I was doing(past continuous)
  • am/is/are + -ing→was/were + -ing
• {14} I was doing(past continuous) and I did(past simple)
  • past simple
    • we played complete action
      • It has both a beginning and an end.
  • past continuous
    • we were playing unfinished action
      • We know the beginning, but we don't know the end.
      • and sometimes we need to think about whether the verb is sustainable?
        • happen fall etc.