在我们的脑海里often作频率副词，用于一般现在时，这也是我们根深蒂固的用法：
He often watches TV in the morning. (一般现在时)
他经常早上看电视。
I often go to the library on Sundays.
我经常星期天去图书馆。
但是often还有许多用法，请看其用法要点：
1.often表示“经常”，通常放在行为动词之前，特殊动词（助动词、情态动词、动词be）之后，often可以放在句首，还可有放在句末。often通常用于与一般现在时、一般过去时或者一般将来时，大家要特别注意often与情态动词will连用，表示一种将来惯常的行为，与情态动词would连用，表示过去惯常的行为。
She is often late for work.她经常上班迟到。
They often go to cinema together.他们经常一起去电影院。
You must often come to see her.你要经常来看她。
2.often放在句末用来加强语气
You won't see me often.你不会经常看到我的。
He writes to me often.他常常给我写信。
3.often放在句首时表示强调
Often did we warn him not to do so. 我曾常常警告他不要那样做。
4.与will连用表示将来惯常的行为：
We will often help the old men next year.明年我们将经常帮助这个老人。
They will often come here next week.下周他们打算经常来这里。
5.与情态动词would连用，表示过去惯常的行为
When we were children, we would often stay up all night.我们当孩子时经常通宵不睡。
6.often后接动词过去式用于一般过去时
例：I often went the zoo on weekends.我过去经常周末去动物园。
He often went the library on weekends.他过去经常周末去图书馆。
Jim often got up early last year.吉姆去年经常早起床。
7.特别注意：often可以用于一般将来时
例：I will often go to see her next year.我明年会经常去看她的。
We will often help the old men next year.明年我们会经常帮助这个老人。
Turn on the television or open a magazine and you will often see advertisements showing happy, balanced families.
你一打开电视机或翻一翻杂志，就常常会看到显示幸福、稳定家庭的广告。（四级考题）
Art thieves will often hide an important work for years after it has been stolen.
艺术品盗贼偷走重要艺术品后常常会把它藏匿好几年。柯林斯高阶英汉双解学习词典》
Wakeful babies will often continue to need little sleep as they grow older.
通常睡眠轻的婴儿长大后仍然只需要较少的睡眠。
Electrical retailers will often take away old appliances if you buy a new one, sometimes in part-exchange.
买新电器时，电器经销商往往会拿走旧电器，有时会以旧换新。
They will often get food at night as well.
它们也经常在晚上进食。
The lion will often stalk its prey for hours.
狮子经常悄然跟踪猎物达几个小时。