<p>1) Independence is not countable. You cannot pluralize it. Two people who are independent have independence, or in this case, an independence. You use the indefinite article “an” to communicate that the independence is particular to each child. If you are delivering a phone call message to someone, you may say “a Mr. Cooper called you.” The idiom “one of a kind,” which means “unique,” utilizes this as well, because we know the “kind” is specific. We can’t assume that it can be any kind, otherwise it wouldn’t be unique.</p>
<p>The indefinite article “a” or “an” can mean “a certain” or “a particular.”</p>
<p>One may have the urge to say “a [noun] that…” because the “that…” makes the noun particular or more specific:</p>
<p>“There is a happiness that makes the heart afraid.”
“There is a particular kind of happiness that makes the heart afraid; this is different from the kind of happiness that does not make the heart afraid.”</p>
<p>2) “has led” is not in the past tense – it is in the present perfect tense. It describes an action that occurred in the past and still has relevance in the present.</p>
<p>It might mean that you do something continuously (as a routine):
“Since 2008, I have eaten egg and toast for breakfast every morning.” – I still do in the present
It might mean that you did ONE thing in the past, but it still affects you in the present:
“I have prepared for the test.” – I am not preparing anymore, but I am prepared. If you simply say “I prepared for the test” you are only indicating that the action took place, but not that it still has relevance (meaning you may not be prepared anymore and need to study again).</p>
<p>All that being said, “it has led to the establishment” and “it led to the establishment” are both correct, but you only use the present perfect when you need to. In this case, we are just adding a simple detail (a parenthetical) about the fact that it led to the establishment. There is no point in mentioning that it is still established today because the sentence strictly talks about the past.</p>
<p>3) The sentence starts off with “Jane Eyre must make many difficult choices,” which refers to choices that haven’t been made yet. You may say “like when she forces herself…” if you are looking back on something and describing an event that is already known. It hasn’t happened yet since we just established that she “must make… choices.”</p>
<p>A gerund has no tense:</p>
<p>“the forcing took place in the past”; “the forcing is taking place”; “the forcing will take place”</p>
<p>One may be confused about this fact because a gerund is identical to a present participle in form. A present participle is the verb form of a gerund (“I am forcing her to leave the house right now”) and is in the present tense. A gerund acts as a noun and has no tense.</p>
<p>So, since a gerund has no tense, you can use it to indicate an action that is arbitrary. “like when she forces” is too specific. Not to mention it indicates the time (when she forces) as opposed to the action itself.</p>