not often&often&usually&sometimes 之间的频率区别?特别是not often!
问题描述：
not often&often&usually&sometimes 之间的频率区别?特别是not often!
答
not often = 不常
often = 常常
usually = 通常/平时
sometimes = 有时候
答
usually的频率是最大的
其次是often
然后是sometimes
not often是 不经常 所以他的频率最小