
口诀:be后实动前助主间。
对频率提问用 how often 或 how many times。
频率副词有always(100%),usually(80%),often(60%),sometimes(40%)(=notalways),seldom(20%),never(0%)。

口诀:be后实动前助主间。
对频率提问用 how often 或 how many times。
频率副词有always(100%),usually(80%),often(60%),sometimes(40%)(=notalways),seldom(20%),never(0%)。