With what verbal form can とたん be used？


I studied that とたん must be used after a verb in the past form, and that, also
the clause that follows it is in the past form. In this case it bears the
meaning of "as soon as something happens, something else also happens".
However, I saw that とたん can also be preceded by a present tense and that the
following clause can be present too, but I'm not sure if the meaning of とたん
then changes. As in:「会社に入る途端に勉強しなくなる人が多い」. Could somebody provide me some
examples to figure it out?




「途端」と言う意味は、ある物事が起きた後そのすぐになにかのアクションが起きるときに使います。  
英語だと、`immediately`や`as soon as`と同じ様な意味です。  
(The meaning of the word "途端" is used when an action occurs immediately after
something happens.)

今回の場合ですと、(In this case,)

> 社会に入る途端勉強しなくなる

と言うのは、「 **社会に出たらすぐに勉強しなくなる** 」、または「 **社会に入った瞬間に勉強と言う物をしなくなる** 」と言うことを表しています。  
(This means that "社会に出たらすぐ勉強しなくなる" or that "社会に入った瞬間に勉強と言う物をしなくなる".)

> Could somebody provide me some examples to figure it out?

いくつかの例を提供します。(I will show you some to explain:)

  * 私が声をかけた **途端** 、彼は叫んだ (As soon as I called out to him, he screamed.)

  * 家の中は暖かかったが、外に出た **途端** 気温が一気に下がった   
(It was warm inside the house, but once outside, the temperature dropped
dramatically.)

