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I am learning english, an I am wondering if I would be "correct" in using only the past tense and never using the present perfect tense. I might be over-simplifying the english grammar ...
So, are there some situations where it would be incorrect using the past tense instead of present pefect ?
(the following link gives some axample where past tense shall be used instead of present perfect, but no example where present perfect shall be used instead of past tense: Present perfect for past action with present effect)
Many thanks for your replies, Thierry