usuallyoften属于副词词性
例句
1、
Third， over 6/ 10 of the teachers investigated say they usually or often request their students to read textbook before ( or after) lessons and to be active in classroom， while the students'； read less than they were expected.
超过6/10的被调查教师总是或经常要求学生在课前（或课后）阅读教材、在课堂上进行活动，而学生的相应回答比教师的回答要低得多。
2、
Specialized platforms are usually simpler and often provide some unique services.
专门平台通常比较简单，常常提供某些独特的服务。
usuallyoften属于什么词性
属于副词，在句中做状语，常用一般现在时。usually"常常，通常"，often经常。例如:I often read English in the morning.我经常早晨读英语。
