Exercise 10.2

1. I saw the astronomer with a telescope has the two structures below:

'I am using the telescope in order to see the astronomer'	'The astronomer I saw was the one who had a telescope'

2. I saw the book that you were reading in the library has the two structures below:

'The book I saw was the one that you were reading in the library'	'It was in the library that I saw the book that you were reading'

3. Fred realised that Mary left when the party started has the two structures below:

'It was when the party started that Fred realised that Mary left'	'Fred realised that it was when the party started that Mary left'