Looking on the internet deeply has found these results:

but much improved is the most popular phrase on the web.

but much improve 18,800 results on the web	but much improved 1159,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
But much bigger, overlooking San Francisco Bay. There is now a better consultation of professionals, but much remains to be done to improve consultation with other sections of civil society, and satisfactory schedules have still to be established. I repeat that the adoption of the Lisbon Treaty would certainly very much improve this situation. I can see your time in France didn't much improve your accent. Irresistible, but much too expensive. But much remains to be done. But Much is safe as long as we are not seen. Mr President, I would also like to thank Mrs Attwooll for her cooperation leading to a compromise which, in my opinion, very much improves the Commission's two proposals, which were originally untimely and doomed not to be complied with.	improved agreement The odd twinge, Mr. Langrishe, but overall much improved. as opposed to the highly problematic interim agreement of last February This operational cooperation is sometimes not particularly obvious, but it exists and it has been much improved over the last year. But when all is said and done, I firmly believe that this much The European Parliament acquired much But I imagine in French, it's much improved. deserves this Parliament's consent.

but much improve

18,800 results on the web

but much improved

1159,000 results on the web

More popular!

But much bigger, overlooking San Francisco Bay.
There is now a better consultation of professionals, but much remains to be done to improve consultation with other sections of civil society, and satisfactory schedules have still to be established.
I repeat that the adoption of the Lisbon Treaty would certainly very much improve this situation.
I can see your time in France didn't much improve your accent.
Irresistible, but much too expensive.
But much remains to be done.
But Much is safe as long as we are not seen.
Mr President, I would also like to thank Mrs Attwooll for her cooperation leading to a compromise which, in my opinion, very much improves the Commission's two proposals, which were originally untimely and doomed not to be complied with.

improved agreement
The odd twinge, Mr. Langrishe, but overall much improved.
as opposed to the highly problematic interim agreement of last February
This operational cooperation is sometimes not particularly obvious, but it exists and it has been much improved over the last year.
But when all is said and done, I firmly believe that this much
The European Parliament acquired much
But I imagine in French, it's much improved.
deserves this Parliament's consent.