Difference between 「〜 時{じ}に」 and 「〜 しながら」


What is the difference between 「〜時{じ}に」 and 「 〜しながら」? I know I can say
「緊張しながら」 - means "while worrying..". Would it be correct if I write it as
「緊張時に」?




「～しながら」 explicitly means two different things are happening concurrently.

「～時【じ】に」 literally means "at the time (of ～)". You may translate this as
_when_ , _if_ , _before_ , or _after_ , depending on the context.

  * 飲酒【いんしゅ】時【じ】に車を運転する drive a car _after_ drinking (i.e. under the influence of alcohol)
  * 飲酒しながら車を運転する drive a car _while_ drinking (i.e., a steering wheel in one hand, and a can of beer in the other hand...)

  * この薬は就寝【しゅうしん】時に飲んでください。 Take this medicine _before_ going to bed.

  * (*)この薬は就寝【しゅうしん】しながら飲んで下さい。 Take this medicine _while_ asleep(?).

  * 緊張しながら while being nervous, while feeling tension

  * 緊張[時]{じ}に when/if I feel nervous




「～しながら」 explicitly means two different things are happening concurrently.

「～時【じ】に」 literally means "at the time (of ～)". You may translate this as
_when_ , _if_ , _before_ , or _after_ , depending on the context.

  * 飲酒【いんしゅ】時【じ】に車を運転する drive a car _after_ drinking (i.e. under the influence of alcohol)
  * 飲酒しながら車を運転する drive a car _while_ drinking (i.e., a steering wheel in one hand, and a can of beer in the other hand...)

  * この薬は就寝【しゅうしん】時に飲んでください。 Take this medicine _before_ going to bed.

  * (*)この薬は就寝【しゅうしん】しながら飲んで下さい。 Take this medicine _while_ asleep(?).

  * 緊張しながら while being nervous, while feeling tension

  * 緊張[時]{じ}に when/if I feel nervous

