Final answer:
The sentence should be 'When a decision will affect your life for some time, think carefully about it.'
Step-by-step explanation:
The sentence 'When a decision will effect your life for some time, think careful about it' is written incorrectly. The correct sentence should be 'When a decision will affect your life for some time, think carefully about it.' The word 'effect' should be changed to 'affect' because 'affect' is a verb that means 'to influence' while 'effect' is a noun that means 'a result or consequence.'
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