[lennydizzy]

Can you please give some examples?

[ronilan]

Not in the article but still a good example:

> There are an alarming amount of typos and grammatical errors ...

Errors are countable. Should be:

There is an alarming number of typos and grammatical errors ...

[raverbashing]

Countable elements should use are instead of is

There are many cars. There is much pain.

http://www.edufind.com/english/grammar/nouns3.php

[ronilan]

The number is singular.

There are many errors. There is an alarming number of them. There is too much debate. But not enough tipos.

[raverbashing]

Your right ;) http://en.wiktionary.org/wiki/number (item 5)

[seanmcdirmid]

I would call that borderline, the original phrase was still clear and wasn't hard to read. Also, as verbal empire English, it's fine.

Living in china, I'm asked to correct a lot of grammars.

[tinco]

What's your favourite grammar to correct?

[erichocean]

Nice.