Student or Learner
My respected teacher,
1: "I was getting bored while sitting on the bed." OR "I was getting bored while I was sitting on the bed." ?
2: "Some people start writing poetry when their hearts are broken." OR "Some people start to write poetry when their heart is broken." ?
3: ''Not to speak of writing poetry in English, I can't even write in my own language." Explain this please?
4: "We must build vocabulary up.'' OR "We must build up vocabulary." ?
Thanks in advance!