This example is an incorrect use of the present perfect tense. The verb formation itself is fine have seen , but last week refers to a specific moment in the past, which the present perfect tense cannot do because there is no connection between the past and present. It is acting as the simple past should and deals with an event that is over, completed, and definite. This sentence is correct. The word before is an unspecified time and simply means that you have seen the movie at somewhere in the past up through the present.
You could have seen it last week; you could have seen it last year. The point is, however, that is it unspecific and bridges the gap between the past and the present.
At some point between all things past and where we are now, you saw the play. To see a further explanation of the present perfect tense, click here. The past perfect tense is used to describe the idea that something occurred before another action in the past.
In other words, if you are talking about a past event and need to go further into the past to talk about something else, that is what the past perfect tense is used for. The best way to keep track of saw vs. Seen is the exact opposite; it cannot appear without a helping verb and never stands alone. Is it saw or seen? While these two verbs forms are sometimes mixed up, they are pretty easy to keep track of.
Saw is used with the simple past. Forgot Password? Looks like you are here for the first time. Please register by filling the details below. Your Preferred Programs. I understand that my data will be held for as long as I am registered with the site and I will continue to receive such communications until I amend my user profile.
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