以下幾句英文的grammar 對不對?

第一句。。totally 唔make sense
1. Why does this book have more songs than that one? Or
How come this book has more songs than that one?
第二句 正確。。 ！！

第三句都係正確＝）

第四句又唔MAKE SENSE 啦！ 想問人D GRAMMAR 岩唔岩其實好簡單。。
但你就整到句句子好複雜咁。。
you can ask like this: Are these sentences grammatically correct ?
Any grammar mistakes in these sentences ?
Is the grammar okay in these sentences ?

2011-11-21 13:24:48 補充：
By the way 另外個3位有D答案都係錯OTZ。。。

1. 為什麼這本書的歌曲比那一本書多?
Why is that this book has more songs than that book?
Why does this book have more songs than that book?

2. 我不夠睡!
I haven't got enough sleep (lately)!

3. 你明不明白我們在說什麼?
Do you understand what we are talking about?
Did you understand what we've been talking about?

我這一些句子的grammar對不對?
Are my sentences grammatically correct?

以下是本人的建議,請多多切磋:
1. why the music of this book is more than that book?

2.I cannot get enough sleep.<--指每天

3.Do you understand what are we talking about?

Is it correct in my grammer