OK guys. I thought it was obvious, but perhaps I assumed too much. Let's look at these two sentences as presented by William:
1) Are you finished with your homework?
2) Have you finished your homework?
Isolating the verb phrases in these sentences we have 1)
are finished, and 2)
have finished. Expressly, sentence 1) contains a present passive form, and number 2) a present perfect form. Both forms use the third form (or past participle) of the verb itself, which can sometimes be confusing to students, or teachers, for that matter. Both of these sentences contain
present verb forms.
Now, I thought William, and the rest of you too, would be able to figure out the salient difference between a present passive and a present perfect. Here we go. Present passive is a simple tense, which is to say that it is concerned exclusively with the factual elements of the situation under discussion. Time is not an issue within the verb phrase. There might, however, be other words or phrases in the sentence which refer to the timing of events, so please note I am not claiming that time is never an issue in sentences with present passive verb forms. But in our example sentence 1), there are no timing words, so we know that the meaning is entirely about the fact of whether or not the homework is finished. Period!
Present perfect, on the other hand, contains aspect, or timing information imbedded within the verb phrase, as all perfect forms do. In this case, since it is a
present perfect form, the timing includes the present moment and looks backwards in time towards the event under discussion. It is the
direction of time that is the central issue in passives, and that direction is always backwards from the point-of-view specified by the form of the auxiliary (
have). In this case, sentence 2) looks backwards from NOW to the moment at which the homework is finished.
But now we must remember that both example sentences in this case are questions. That means that the speaker, contrary to when he is making an assertion, is requesting the
listener to express
his view of things. So that...
1) Are you finished with your homework?
...can ba paraphrased as "
Is it a fact that your homework is done?"
While...
2) Have you finished with your homework?
...can be paraphrased as "
Is it a fact that your homework was done before now?"
Neither is 'more hostile or confrontational' than the other. That will depend on the manner in which the words are spoken, not on the verb form. Nor does the difference in form imply anything absolute about whether the homework is in fact completed. That may or may not be an assumption of either the speaker or the listener (or both). But both could refer to a cessation of homework, even if it is not completed.
The complete, and only, difference between the sentences is that one refers only to fact, and the other refers to timing as well as fact. Of course, we all can tell that the pragmatic difference is minute. The speaker wants to know if the homework is finished (whether that means
completed or not is technically still up for grabs). So if William was referring to the pragmatic difference in his original post, then the answer has to be, "
Not really." But his question asked only if there was a difference, and to that we reply as above.
All right. Class dismissed.
Larry Latham