一.Least是little的最高級，作副詞和形容詞來用
It happened just when I least expected it.
二.Least+形容詞或副詞，構成的最高級是“最不XXXX”的意思
1.This is the least expensive method.這是最不費錢的方法
2.She has not the least experience.她毫無經驗。注意not the least是“絲毫無XXX”的意思
三.名詞least常用用法
1.A has little, B has less, and C has the least.甲沒有多少，乙更少，而丙是最少的。
2.He is not in the least touched.他一點也沒被碰傷。
3.You should at least tell me. 你至少該告訴我啊。 at least=至少