Student or Learner
Are the following sentences natural to a native ear?
1. How would they have worked out an amicable agreement?
2. How would the structure may have worked out in this case?
3. How would an employee become a partner at your old firm? ( Here I am enquiring about a personís past firm. The firm doesnít exist anymore)
The use of 'have' is not clear me here. I thought when talking about past habits/practices we can use 'would'. For example, sentence #4 below. In sentence #3, I thought I was talking about a practice of that firm.3. How would an employee have become a partner at your old firm?
4. I would go to that store every day, when I was a teeager.