THE with countries

[Not_myself]

Hello everybody. I'm a sudent from Belarus, like English and i got a question. recently i've found out that some countries can be used with the (i'm talking not about those with the words union, states, republic, etc in their names). these countries are the Argentina, the Congo, the Brazil and some others, i don't remember them all. now i want to ask you whether it's really so, cause some people told me, that it's not right to use the with these countries. if you know sth about that, plz let me kow. thanx a lot.

[David L.]

these countries are the Argentina, the Congo, the Brazil and some others,

In the past, people might refer to the Argentine Republic in the shortened form, The Argentine. Nowadays, it is most commonly referred to as Argentina (no 'the').

It is not 'the Brazil', just Brazil.

'the Congo', of the old jungle movie days, has been split into The Republic of the Congo, and The Democratic Republic of the Congo.

[Raymott]

Hello everybody. I'm a sudent from Belarus, like English and i got a question. recently i've found out that some countries can be used with the (i'm talking not about those with the words union, states, republic, etc in their names). these countries are the Argentina, the Congo, the Brazil and some others, i don't remember them all. now i want to ask you whether it's really so, cause some people told me, that it's not right to use the with these countries. if you know sth about that, plz let me kow. thanx a lot.

There are some countries that "The" is used for.
The Bahamas, The Gambia, The Netherlands.
You can do a search for "List of countries" and get an answer. Some lists leave out the "The" for Netherlands. I can't quickly find an authoritative list, so I'll leave the search to you.

[Tdol]

With Ukraine, you will see it with and without the article, the latter carrying over from before it became an independent nation, which means that it is probably better not to use it.