The heart is a lonely hunter
1. We can see at line 21 « That was the name she would have written on everything when she was seventeen years old”, we can see she is imagining her life, so she is less than seventeen years old, and can’t be Bubber and Ralph’s mother.
2. Mick seems to be young, and living in her world, she probably like the children, but she leave them while she is climbing on the roof, but she doesn’t pay attention to them on an unintentional way.
3. Part I : line 1 to 20: the present, the reality
Part II: Line 20 to 30: imagination of a future
Part III : Line 30 to the end: Nostalgia, and memories of the past.
4. Mick does not smoke all the time, because we can see it at line 19 :” the cigarette gave her a drunk feeling”, she feels sick when she smoke cigarette, because she is not used to. I think, when the narrator say “ she had to finish it”, he means she wants to finish it, she may need it.
5. Mick is an imaginative person, who lives in a dream. We can see it in the passage when she is imagining her future life, but she is talking with the conditional. She is adventurous, because she dares to climb on a roof, which is not her property, she is not afraid lines 10-11:” she spreads her arms like wings”. She must be an artistic person, because she is sensitive to the music.
6. When Mick stood up on the roof of the (ruined house)new house under construction, she felt free.( L10 “ she spread out her arms like wings”).
She thought of all the things she had done when she was young ( all the things she will do older). She smoked half a cigarette ( L28” when Mick had finished half the cigarette she smashed it dead”.) and hummed (L20” she began to hum”) some piece of music or other (some piano piece). She was unable to remember any because she had forgotten all the pieces of music she had heard ( Line 39-40).
7. The modal auxiliary “would” express the imagination of the future, we can suppose it by the word line 27 :”