<p>1) In this sentence:
They tarnish his reputation as (the) Bolsheviks were accustomed to do with their opponents</p>
<p>Is the "the" necessary?</p>
<p>2) [...] during (the) Bolshevik('s)</p>
<p>What about the "'s" and "the"
Moreover you would say "(the) Bolshevik's era" or "(the) bolshevik era".</p>
<p>I think I've a big problem with articles.</p>
<p>3) They must exist for (the) community (I'm sure you've grasped the context)
reigning over "the" world</p>
<p>4) He can't, with his abilities, shine "as he would"
Should I add "like" after would? I mean, is it clear and formal enough for an essay</p>
<p>It's for an essay --> Please, Answer according to the conventions of Standard written english.
Can you paste a link of a website that COMPREHENSIVELY discuss about "articles". Even sth esoteric would be great.</p>
<p>As to some usage rules for articles see, e.g., [Purdue</a> OWL: How to Use Articles (a/an/the)](<a href=“Purdue OWL® - Purdue OWL® - Purdue University”>Purdue OWL® - Purdue OWL® - Purdue University) Purdue has numerous pages on its site in that OWL section on grammar rules; however, as with many English usage rules, they are not absolutes and thus there can be exceptions from what is provided on that page.</p>
<ol>
<li><p>In the Bolshevik sentence, it sounds like the entire sentence is supposed to be in the past and thus tarnish needs to be tarnished. As to using “the,” you actually have your choice in that sentence to use it or not. Using a “the” would imply you are referring to the Bolsheviks as a political party or group; not using a “the” changes the sense a tad to referring generally to the people who make up that group.</p></li>
<li><p>The “during” phrase seems to be definitely referring to the political party and the time it was in power and thus a “the” is necessary and the 's is not.</p></li>
<li><p>In the community sentence both the’s are needed because you are referring to specific things, community and world, and not anything that has a proper name.</p></li>
<li><p>The problem I am having with the fourth sentence is I am not sure what you are trying to convey. If you are trying to convey that he would like to do better, you definitely need to add like after would and even for more clarity you might add “like to shine.”</p></li>
</ol>
<p>The previous poster covered 1-3 well. For 4, add a “have” and more specifics. I’m not sure why you would want to add a “like”- what is the context? Is he lacking in abilities?</p>