Giải thích giúp em với ạ :(

1. This is the first time I have been to england

2. Tom started learning when he was 10

3. My teacher last tough us the english lesson

4. The last time we met was 5 hours ago

5. It is a long time since we learned English

6. How long have you learn English?

anh chị giúp em vs nhé :(