一、usually, sometimes, always, often等词在英文中被称为“频度副词”,是用来表示动作频率的,即在一定的时间内动作重复发生或状态重复出现的次数。一般说来可按频率大小排列: alwaysusuallyoftensometimesnever 二、频度副词的位置 1. 在be动词之后。She is sometimes very busy. 她有时很忙。 2. 在助动词或情态动词之后。I will never forget that day. 3. 在实义动词之前。如: We often go there. 我们常去那儿。 4. sometimes也可放在句首、句中或句末。Sometimes she writes to me. 她有时候给我写信。 She writes to me often. 她经常给我写信。 5.频度副词与not连用时表示部分否定, 对这些频度副词提问时,用how often。I write to my brother sometimes. How often do you