Answer:
9C a.
- He left school two years ago.
- I've lived in Vancouver for two years, but then I moved to Toronto.
- She's lived in Florida since 2010.
- My sister had her baby yesterday!
- I work in an office. I've worked there for 20 years.
- The city has changed a lot since I was a child.
- They're divorced now. They have been married for ten years.
- I met Sandra when I was in College.
9C b.
- A How long has he lived there?
B He moved there in September
2. A When did Picasso die?
A How long has he lived in France?
B For a long time. He left Spain when he was 25.
3. B How long have they been married?
A They have been married since 1995. They met in College.
B Really? Was that in Chicago?
Explanation:
The past simple is used when we talk about a past action or event which has finished and is concluded, and we are aware of the time in which it happened, precisely the date or specific point in past, and sometimes also the location. On the other hand, we use present perfect when we talk about past events which are not particularly located in a specific moment in past, and may not be concluded yet. That is why they may be related to the present in some way.
Important: The adverb since is only used with present perfect, whereas the preposition for can be used with both time tenses.
