Student or Learner
Practical English Usage wrote,
'When just means 'a moment ago', past and present perfect tenses are both possible in British English. A present perfect is preferred when we are giving news. .....
In American English a past tense is also common. .....'
Oxford Advanced Learner's English-Chinese Dictionary wrote,
'(with perfect tenses; in US English with the simple past tense) very recently; in the immediate past'
Which one is correct? 'Past and present perfect tenses' OR 'perfect tenses' is commonly used in British English?
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BrE: I've just dropped my wallet OR I just dropped my wallet (the first is more common)
AmE: I just dropped my wallet.
So in BrE, the present perfect and the past simple can be used. In AmE, the past simple is used (almost) exclusively in this context.
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