<li>The condition known as laryngitis [usually causes] the vocal cords and surrounding tissue to swell, [thus] preventing the cords [to move] [freely]. [No error]</li>
</ol>
<p>2.His love of politics [led] [him] to volunteer in local campaigns [as well] as [a job] in a government office in the state capital. [No error]</p>
<li><p>Now that Michiko [finished] the research, she feels [reasonably confident] [about writing] her paper on the [rise of] the progressive movement in the United States. [No error]</p></li>
<li><p>[Although] she considers her chemistry research [complete], she [has heeded] her professors advice and [is conducting] three additional experiments. [No error]</p></li>
</ol>
<ol>
<li>The condition known as laryngitis [usually causes] the vocal cords and surrounding tissue to swell, [thus] preventing the cords [to move] [freely]. [No error]</li>
</ol>
<p>[to move]: you can't prevent something TO move, you have to prevent FROM moving.</p>
<p>2.His love of politics [led] [him] to volunteer in local campaigns [as well] as [a job] in a government office in the state capital. [No error]</p>
<p>[a job]; chop out 'to volunteer in local campaigns as well as' and we get his love led him a job in a government office. It should be [to take a job]</p>
<ol>
<li>Now that Michiko [finished] the research, she feels [reasonably confident] [about writing] her paper on the [rise of] the progressive movement in the United States. [No error]</li>
</ol>
<p>This is a toughie. I think it's [about writing] because typically people are confident OF things, not ABOUT them. I'm not totally sure though.</p>
<ol>
<li>[Although] she considers her chemistry research [complete], she [has heeded] her professors advice and [is conducting] three additional experiments. [No error]</li>
</ol>
<p>Another toughie, I think it's [has heeded] which should be [heeded] due to verb choppiness.</p>
<p>Number 3 seems to be no error to me because OF WRITING definitely would not fit - "she feels reasonably confident of writing her paper" and I believe everything else is correct, although the sentence is worded a bit awkwardly.</p>
<p>I agree about number 4 being HAS HEEDED because has and is are different tenses and it should be changed to either heeded like John said or is heeding.</p>
<h1>3. Because the tense used in the main clause is present ("feels"), the tense in the suborninate clause should also be present in order to avoid inconsistency. So, I'd choose [finished] and change it to HAS FINISHED.</h1>
<h1>4. I'm pretty sure that this sentence is correct. Someone would say [has heeded] is problematic but I think this phrase is OK as far as, like #3, tense consistence goes.</h1>
<p>@ thread starter: You picked these questions from the Blue Book right? or where? Can you give the answers?</p>
<ol>
<li><p>You cannot stop something to move (unidiomatic expression). You stop something FROM MOVING. Hence [to move] is incorrect here.</p></li>
<li><p>Error in parallelism. "to volunteer..." is not properly linked to another infinitive by "as well as." [a job] is incorrect.</p></li>
<li><p>Inconsistent tense use here. "Now" and "feels" indicate the present tense. "finished" is past tense and should be changed to the present perfect "has finished." [finished] is incorrect.</p></li>
<li><p>No error. Whenever you pick no error, always go through every choice. [Although] and [complete] are used correctly here. [has heeded] might sound awkward, but it's consistent present tense (remember, just because something SOUNDS awkward or could be reworded doesn't mean it's grammatically incorrect). [is conducting] is also consistent present tense. Hence no error.</p></li>
</ol>
<p>If you cannot give a solid grammatical reason, you cannot say part of a sentence is incorrect.</p>
<p>4 has no error. “has heeded” works with “is conducting” because they are both in the present tense and the heeding was a long process leading up to the “conducting.” “has heeded” is in the present perfect tense, signifying that the heeding of the advice occurred in the past and is continuing in the present, at least in effect. She heard her professor’s advice, heeded it, and is still heeding it in the present, while she is conducting the experiments.</p>
<p>I have studied and am taking the test implies that the studying took place in the past but is affecting the present (while you are taking the test). You presumably have been ready for the test since you studied. Having studied, you are taking the test. Having heeded her professor’s advice, she is conducting additional experiments.</p>
<p>Since the experiments began, the scientists ( have discovered) that (they) can separate the
reagents more effectively (by using) a centrifuge machine (and not) by shaking the tubes .(no error)</p>
<p>can someone please give me the answer to this</p>