usually后面加什么时态（usually后面跟什么时态）

they usually go to school by bike.

经常 与often,usually,every day,always,sometimes

关键词: always, often, usually, sometimes, every day, etc.

【贵州2015中考面对面】课标版英语第二部分 语法专题

section a(2a-2c)课件 (新版)人教新目标版八年级上

初中英语动词时态详解 配套习题(精)

2015-2016学年高考英语二轮复习精品课件:专题二语法 第2讲时态与语态

时间状语:always, usually, often, sometimes, every week (day

频度副词: sometimes(有时), often, always(总是), usually(通常)

动词时态填空100题