Where to use During?
“During” comes before a noun. It relates to a short action, not telling about the extent of time , since the incident is happening. (During+noun)
Everyone was carefully listening during the presentation
The weather turns quite pleasant during winters
Where to use While
“WHILE” is used before a subject and verb (While+subject+verb)
The door bell rang, while I was trimming my nails
I met him while he was busy preparing the notes
Application requesting for unpaid leaves
Subject (Requesting for unpaid leave)
This is X (your name + Designation) requests to inform you that I have few personal obligations and I am looking to take 7 unpaid leaves out of the total number of 10 unpaid leaves which I am authorised currently.
This is my request to grant me “unpaid-leaves” starting from 17th April 2018, till 23rd April, 2018.
Considering the nature of these leaves, there will understandably be no change in the salary structure.
I will be highly thankful to you, if you oblige
Thank You in advance,
Z (your Signature and Date)
Also Read the following 3 letters:-