<p>Would I say.
He died from penumonia or
he died of pneumonia.</p>
<p>Sorry if i spelled things wrong.</p>
<p>Died of pneumonia.</p>
<p>What about this one
He fought to end slavery
He fought for the end of slavery or against slavery etc.
In other words. Can I do fought to.</p>
<p>Also these
He objected against being a doctor
He objected to being a doctor
And
He accidentaily mistook (past form of mistake?) him as a sailor
He accidentaily mistook him for a sailor.</p>
<p>Sorry for TP but
He wondered at how big it was
He wondering about how big it was.</p>
<p>he fought for</p>
<p>objected against</p>
<p>mistook him for a sailor</p>
<p>wondering about makes no sense ata ll. He wondered at how big it was. Makes a little bit more sense.</p>
<p>Lol thanks for the alacrity to which you answered my questions 
Also these LAST 3. (feel free to add any that you guys want)
He partook in the study
He partook of the study
Ok I know this above one may be simply the first one but on this one site it says partake OF is the correct idiom.
He was a threat to the US
He was a threat of the US.
Again same prob. as last one. I think its first… but the site says 2nd.
He planned on robbing me
He planned to rob me</p>
<p>He partook in the study</p>
<p>hmmm thats interesting. i doubt the site is right then.</p>
<p>He was a threat to the US</p>
<p>He planned to rob me</p>
<p>the site might not be a reliable source</p>
<p>its that flashcards.net or something.</p>
<p>actually both could be right. Depends on what your saying.</p>
<p>He partook in the study
He partook of the study</p>
<p>except this one is “in” for sure.</p>
<p>He was a threat to the US
He was a threat of the US.</p>
<p>but this might be both</p>
<p>He fought to end slavery is right. “To end” is an infinitive; “to” is not part of the idiom “fought.”</p>
<p>Also, “objected to” is correct.</p>
<p>What about this one
He had a desire to eat chocolate
HE had a desire for chocolate.</p>
<p>And this one. he guessed at the question. He guessed on the question.</p>