always，often，hardly ever，never，sometimes等频度副词的辨析。
（1）She

always

always

gets up at six o'clock.
（2）He

often

often

gets up at six o'clock，but today he got up at six thirty.
（3）Some of my friends exercise every day and

hardly ever

hardly ever

eat junk food，but the others eat junk food every day.
（4）I can't swim.So I

never

never

go to the beach to swim.
（5）I

sometimes

sometimes

go to the dentist for teeth cleaning，but usually I brush my teeth in the morning.