I have broken my arm. (My arm is broken now.)
The police have arrested Joe Smith. (He is in custody now.)
I have done something I must tell you about.
!
This tense is used to introduce new information. When continuing
to talk about it, use the Simple Past Tense.
I have broken my arm. -- How did you do that? -- I fell off a ladder.
3.2 Finished activities with results in the present
Using this tense with activities without indicating duration implies that they
are finished and their results exist in the present.
I have studied Spanish. (I know some Spanish now.)
Sam has traveled the world. (The fortress is finished now.)
Joe has repaired his garden shed. (It is in working order now.)
!
Indicating duration with activities with results in the present may
mean that the activity still continues (or that the period in which it
happens is not over).
Sam has traveled the world for half a year.
3.3 Present durations of state verbs
Use this tense with state verbs. Use the perfect tenses to talk about things
that began at some moment in the past and still continue in the present.
There must be an explicit or implied duration.
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