Quite well & reasonably well

[david11]

1)I know quite well about this country.

2)I know reasonably well about this country.

Can I use the second sentence to express my lesser knowledge(against the earlier one) about the country but still claiming fair amount of knowledge?

[charliedeut]

Yes you could, but I would rephrase the statements; they sound awkward as they stand:

1) I know this country quite well.

2) I know this country reasonably well.

Also note that you could also replace "quite" and "reasonably" with "fairly" (and other such words) to convey the same meaning.

[MartinEnglish]

Yes what Charlie said - but they're not just awkward, they're completely wrong. You need to keep the verb (know) and the object (this country) TOGETHER and put quantifiers such as "quite well/very well etc at the end of the sentence.