What is double-embedded clause sentence ?

[duiter]

Dear all,

I just see the phrase "double-embedded clause sentence" in grammar book

What is this ?

Can you give examples ?

Thanks

 

[Raymott]

Dear all,

I just see the phrase "double-embedded clause sentence" in grammar book

What is this ?

Can you give examples ?

Thanks

What does the book say about it? Doesn't it give an example? I can't imagine the book mentioning this phrase without a context.