4. Read the pairs of sentences and explain the difference in meaning.
1 a He's written a book.
b He's been writing a book.
2 a Who's eaten my chocolates?
b Who's been eating my chocolates?
3 a She's never been to a wedding before.
b She'd never been to a wedding before.
4 a l've tried to call her.
b I've been trying to call.
5 a They'd been married for thirty-five years!
b They've been married for thirty-five years!
