usually,sometimes,ofen后面动词（）.

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usually,sometimes,ofen后面动词（）.usually,sometimes,ofen后面动词（）.usually,sometimes,ofen后面动词（）.usually,somet

usually,sometimes,ofen后面动词（）.
usually,sometimes,ofen后面动词（）.

usually,sometimes,ofen后面动词（）.
usually,sometimes,ofen后面用动词的原形
比如
I usually go for a walk after meal.
I sometimes drink some coffee.
I often help my friends.