It's four years since I last smoked.
=> I haven't smoked for four years.
As soon as my father left the house, my mother appeared.
=> Hardly had my father left the house when my mother appeared.
I advise you to book a table in advance.
=> If I were you, I would book a table in advance.
1. I haven't smoked for four years.
2. Hardly had my father left the house when my mother appeared.
3. If I were you, I would book a table in advance.
It's four years since I last smoked.
=> I haven't smoked for four years
As soon as my father left the house, my mother appeared.
=> Hardly had my father left the house when my mother appeared
I advise you to book a table in advance.
=> If I were you , I would book a table in advance
