3. normally/generally 通常，正常情况下
normally open/close 常开/闭的
Generally speaking 一般来说
It's normally much warmer than this in July.
通常七月要比现在热得多。
4. often/frequently 时常，常常
as often as possible 尽可能经常地
How often do you go back to China for vacation?
你多久回中国休假一次？
Every 5 months.
每5个月一次。
所以问“多久一次”，要用到短语 How often。
5. sometimes 有时，间或
sometimes 这个词表达的频率已经相当低了，但比偶尔的频率要高。
I like to be on my own sometimes.
有时候我喜欢一个人待着。
Life seems so unfair sometimes.
人生有时似乎非常不公平。
6. occasionally 偶尔，偶然
We occasionally meet for a drink after work.
我们下班后偶尔相聚小酌。
It wouldn't hurt you to help with the housework occasionally.
你应该偶尔帮忙做做家务。
