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时 (现在时, 过去时, 将来时) - Coggle Diagram

- - - - 动词原形
      - 第三人称单数V+s
    - - [助动词be+现在分词Ving]
        
        I am
        you/we/they are
        she/he/it is
    - - have/has+过去分词
    - - have/ has been + Ving
- - - - 动词过去式
        
        只强调是否发生
    - - be+Ving
        
        be的过去式was/were+Ving