The verb form that is used to indicate present perfect tense is have + verb - ed.
For example:
I <u>have painted </u>a beautiful painting.
You need to reread your question. There are not enough details for me to give you a proper answer
I’m sure it’s the last one!
Answer:
even though
Explanation:
if you say since, it won't actually make sense.
if you say until you would need a whole explanation or story to explain what happened before they live close to water, which i don't think the teacher will like
Answer: it would change where you wouldn't know his thoughts or opinions hope it helps if not tell me