When to use "has", "has been", "would have", "had", and "had been"???

<p>Always confused which one to use on SAT sentence correction problems...</p>

<p>Can someone explain to me when to use which one? I know it has something to do with different times...That's pretty much it...I'm completely lost...Please help!!!</p>

<p>Thanks in advance</p>

<p>Read the tense section under Silverturtle’s guide. “Has” emphasizes an action completed in the past and is still going on today. Example: “He has been a captain for three years”. This means that was a captain three years ago, and still is today.</p>

<p>“Had” is used to describe actions that occured BEFORE another PAST action. example “I had finished eating my breakfast, when the school bus arrived”.
You ate ur breakfast before the school bus came. But the school bus came is in past tense. So, it’s referring to an action that had occured before an action that also occured in the past.</p>

<p>Ruvuitton, but it can also talk about the future can’t it?</p>

<p>Example,</p>

<p>“He has too do this”</p>

<p>has to ___
means future because the verb stays in the infinitive form (to ___, for example to eat)</p>

<p>its different from the past participle which would be has EATEN. note the difference in the verb</p>