sit和big中i都发/ɪ/，他们的发音一样。

sit和big中的i发音相同，

它们中的元音字母i都发短元音/i/。

类似的英语单词还有：pig, bill, hill, city, fill, will, milk, pick, kick, lit, quilt, thing, think, trip, with, his, six, fix, mix, is, in, inn, it, this, ring, sing, wind, print, bit, fit, king, drink, fish, gift, lift, kill, will, till, wish, thin, thick, print, risk, rich, win等。