質問: 三年前ぐらい と 三年ぐらい前 はどう違いますか? 三年前ぐらい と 三年ぐらい前 はどう違いますか?
回答: @nihongonogakusei basically almost the same and there's only a very slight difference but if "when" is important in the conversation / topic, then using "3年ぐらい前" would be appropriate. example: 「前回日本に行ったのはいつだったけ?」 「3年ぐらい前だったかな」 this might give an impression that person tried to remember exactly when but he/she couldn't recall and implies that (travel to japan last time) was that old (at least "not 2 years ago" and so on... ). 「3年前ぐらいだったかな」 this would simply imply that was around 3 years ago but doesn't add any other information ("3 years ago" isn't that important in that conversation). hope this helps.