Using the present perfect tense is the same as verse 1 only (rccb takan arising in the past, a present and a future to continue), but rather focuses on how exactly do consistently.
Unlike the present perfect tense Article 1 only (NOTE incident in the past. Continue to the present And continuing into the future), but all emphasize that to continue.
Used as present perfect tense Article 1 only (incident in the past. Reaching its present and continue in the future). Exactly. But it is emphasized that carry on.