It is not often that you get such an opportunity.
你得到这样的机会，可不是常有的`事。
Men often don't like to share their problems.
男人往往不喜欢把自己的问题告诉他人。
We don't often have time to talk.
我们常常没有时间谈话。
People are often afraid of things they don't understand.
人往往对自己不懂的东西感到恐惧。
I often think about my friends back home.
我常常想起老家的朋友。