My English textbook

sunny123Then what has happened to my English textbook?

Nothing has happened to it. You have a different book, which is shorter.

Thank you Philip, about the textbook, Can I say .....

1. They have condensed our English textbook.
2. They have condensed our English textbook from ninety pages to sixty pages.
3. They have condensed our English textbook thirty pages.
4. They have condensed thirty pages of our English textbook.
5. They have reduced thirty pages of our English textbook.
All correct?

You could use 1 or 2. 3 would be correct with by thirty pages. 4 and 5 don't work.

3. They have condensed our English textbook by thirty pages.
correct now?

This is correct. I still think the question is odd if you are referring to a sequential text rather than a new edition of the former.

Thank you Philip.
Philip, suppose the former English textbook of last year contained ten lessons.
When we say .....
They have condensed our English textbook by thirty pages.

It could mean that, but I think you're getting far away from your original intent was, which I think has been answered.

Philip, I think you didnt understand my last question. When they say .....

"They have condensed our English textbook by thirty pages."

sunny123Philip, I think you didnt understand my last question. When they say ....."They have condensed our English textbook by thirty pages." They mean A or B?A: They have just omited several lessons of the former English textbook then now it is shorter.OrB: They have written totally a new English textbook that is shorter than the former textbook.?

It could be