<p>Okay.. grammar question that you probably all know.</p>
<p>For the SAT, they test the correct use of Infinitive/ Simple Past/ Past Participle.</p>
<p>I know infinitive is "to__" form. What are the other two?
When do you use them?</p>
<p>On a side note.. when do you use have had, have been, would have known, had come, like as if, which... For some reason these were the "wrong" answers in the identifying errors sections. I don't understand what's wrong with these phrases.</p>
<p>Thanks for your guys' help. I really appreciate it! :)</p>
<p>Your last question is very broad so perhaps you could give us some examples.</p>
<p>Infinitive is “to eat” for example. Simple past is “ate,” and past participle (or past perfect) is “had eaten.”</p>
<p>For my examples, I think they were just missuses of the past and past perfect.</p>
<p>I’m sorry but can someone explain to me when the past vs. past perfect is used?
And what is the If contrary-to-fact condition thing?</p>
<p>I’m using Gruber’s Complete Guide to the New SAT btw…</p>
<p>Past perfect is something that happens in the past before someone else in the past happened.</p>
<p>I had painted my finger nails before I ate dinner. (past before something else in the past)</p>
<p>You can find a better definiton online heh. I just learned about the perfect tense this year, so no worries. It’s fairly rare, but can help on some here and there questions.
[ENGLISH</a> PAGE - Past Perfect](<a href=“http://www.englishpage.com/verbpage/pastperfect.html]ENGLISH”>Past Perfect Tense | ENGLISH PAGE)</p>
<p>Thank you!! I was missing a lot of problems because of this.
MY score has gone from around -9 to -5 on average!! 
(I’ve taken like 3 section tests since I practice this haha)</p>