Some schools teach students that you should not split an infinitive - i.e. putting a modifier (usually an adverb) in between the infinitive to and the verb.
Example:
- I need to quickly run to the store.
I don't focus on this because I think it's idiotic. The only treason that we don't split infinitives in English is because it's impossible to do so in Latin. And basing our language rules on Latin is like trying to play baseball with soccer rules. They're just not compatible.
I digress though. Seriously, if you ever need help with anything grammar related, I'd be happy to help. I was the kid in class who loved grammar worksheets. :o I enjoy teaching it now almost as much as I enjoy literature.