often 时常，常常always 总是usual 通常的，有时候He came home later than usual. 他回家比平时迟。上面三个都是形容词。constantlyShe is constantly changing her mind. 她经常改变主意。continually 1.不停地2.屡屡地,一再地The baby is continually screaming. 那婴孩老是尖声喊叫。frequently频繁地,屡次地This question is frequently asked. 这个问题屡次被提出。 这三个词是副词
