(当前文档不提供在线查看，请下载使用！)
频度副词
肯定句 I often play football after school. always 100%
He/She often football after school. usually 80%
We/You/They often play football after school. often 60%
否定句 I do not often play football after school. sometimes 40%
He/She often play football after school. seldom 20%
We/You/They do...