频率副词 always, usually, often, sometimes, seldom, never等

Gary is always late. He always comes late. Gary总是迟到。

I usually get up at about seven o'clock. 我通常七点左右起床。

Tom and Mary often have lunch together.Tom和Mary常常一起吃午饭。

Sometimes I'm optimistic and sometimes I'm pessimistic.

我有时候乐观，有时候悲观。

I seldom go to a movie alone. 我很少自己一个人去看电影。

Never give your savings account number to someone you don't know.

千万不要把你的存款账号告诉你不认识的人。

Don't you ever shoplift again! 千万不要再在商店顺手牵羊了。