often可以用在句末吗?

OFTEN一词可以用在句尾吗? I study English often.often可以放在句尾吗? always ,often,usually,sometimes之类的词可以放在句末吗 often,always,usually,sometimes之类的词可以放在句首或句末吗 we should exercise often.often可以放句尾吗? often 后面用什么?可以用doing ma often 后面用什么?可以用doing ma ? how often是否可以用hardly ever回答? often 可以用 oftener 么做比较级么? fun可以用在句末吗? also可以用在句末吗 I often piay football.为什么often可以改成usually