(1) has survived (2) warned (1) It started surviving in the past, and it's still surviving. The past is connected to the present. ) (2) A specific time is mentioned ( yesterday ), so only the past is possible.
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(1) has survived
(2) warned
(1) It started surviving in the past, and it's still surviving. The past is connected to the present. (No specific time is mentioned, so the past tense is not required.)
(2) A specific time is mentioned (yesterday), so only the past is possible.
CJ