Looking on the internet deeply has found these results:

we would be grateful if is the most popular phrase on the web.

it would be grateful if 1920,000 results on the web	we would be grateful if 11,420,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	As the Commission and the Belgian presidency are keen on making good progress in time for the next European Council, we would be grateful if you could give this opinion before October. We would be grateful if this could be documented persuasively in the next legislative period. We would be grateful if you could give up that right, since we are running very late. We would be grateful if the House could be informed as to what sort of talks have taken place and what results these have produced. Given that the EU and Japan have started a scoping exercise ahead of potential negotiations on a free trade agreement, we would be grateful if you could answer the following questions. We in the Civil Liberties Committee need to know the legislative basis on which we have to work, and we would be grateful if you could answer all these questions precisely.

it would be grateful if

1920,000 results on the web

we would be grateful if

11,420,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

As the Commission and the Belgian presidency are keen on making good progress in time for the next European Council, we would be grateful if you could give this opinion before October.
We would be grateful if this could be documented persuasively in the next legislative period.
We would be grateful if you could give up that right, since we are running very late.
We would be grateful if the House could be informed as to what sort of talks have taken place and what results these have produced.
Given that the EU and Japan have started a scoping exercise ahead of potential negotiations on a free trade agreement, we would be grateful if you could answer the following questions.
We in the Civil Liberties Committee need to know the legislative basis on which we have to work, and we would be grateful if you could answer all these questions precisely.