Present Perfect
The Chinese ____ (invent) many things.
have invented
This is the third piece of cake that you (ate/have eaten) today.
have eaten
She has died four months ago.
died (simple past-- finished time period)
My notebook isn’t here anymore. Someone ___ (take) it.
has taken (present perfect--recent past action affecting/related to present)
They ___ (finish) doing their homework.
have finished
When they arrived at the party, Sue (already went/had already gone) home.
had already gone
I never traveled to the United Stated.
have never traveled (present perfect - the action can still be modiefied)
She ___ (say) she had paid the bill a week before.
said (simple past)
At last, I ___ (complete) my project. Now I can take a break.
c. have completed
When I ___ (tried / had tried) to shut off my computer, it crashed.
tried
When I called you, you already went to bed.
had already gone (past perfect - action happened before another action also in the past)
She said that her husband ___ (go) fishing the previous night.
d. had gone (past perfect--past action before another one)
I _______ (do - neg) the homework yet.
haven't (or have not) done
He can’t drive us today because he (has lost / had lost) his car keys.
has lost
First I had finished washing the dishes, and then I did some vacuuming.
finished ( simple past -unconnected past actions)
How long _________(you - study) in this school?
have you studied / have been studying (Present Perfect or Present Perfect Continuous
He ___ (draw) a lot lately.
has drawn
Before I ___ (finished / had finished) dinner, my wife ____ (started / had started) to watch TV.
finished / had started
He had given me the report but I haven’t looked at it at all yet.
gave (no use for past perfect)
When I was in high school, I had often wished to be taller.
had often wished → often wished (simple past--completed action, finished time period) MINUS POINTS!!!