I came across a sentence recently: Before I turn 40, I want to have written a book.
Could someone explain to me what does it actually mean?
I'd rather say: Before I turn 40, I want to write a book. but I'm not native speaker.
I understand the meaning of the perfect infinitive in sentences below:
If I had known you were coming I would have baked a cake.
Someone must have broken the window and climbed in
but I can't grasp the difference between:
Before I turn 40, I want to have written a book vs Before I turn 40, I want to write a book
Thanks for any help Marcel