Difference Between " How long " and " Since when "

Hello English learners, I hope you are super fine. In today's lesson we are going to learn different between "How long" and "since when". Well there is no any difference between How long and Since when. There is same hindi meaning = कब से । The first use of How long is used to talk about an action which is going on with perticular time For example :-- Q:- How long have you been studying ? A :- I have been studying for 2 hour. Q:- How long has she been cooking food ? A :- She has been cooking food since morning. The second use of How long is For example :-- Q:- How long does it take you to reach Delhi ? A :- It takes me 30 min. Q:- How long does it take you to cook food ? A:- It takes me 1 hour. In the past :-- Q:- How long did it take you to reach Delhi ? A:- It took me 2 hour. Q:- How long did it take you to get ready for school ? A:- It took me 20 min. In the future :-- Q:- How long will it take you to cook food ? A:- It will take me 30 min. Q:- How long will it take you to get ready for school ? A:- It will take me 1 hour. 🧑‍🏫Learn Spoken English Course Free - 👉Spoken English course Day 1 - • Simple Present Tense |... 👉Spoken English course Day 2 • Simple Past Tense | Ru... 👉Spoken English course Day 3 - • English Grammar Lesson... 👉Spoken English course Day 4 - • Present Continuous Ten... 🧑‍🏫Learn Phrasal Verbs - ✨Phrasal Verbs with relationship - • 12 Phrasal Verbs to ta... ✨Phrasal Verbs with shopping - • Phrasal Verbs for shop... ✨Phrasal Verbs with PUT - • PHRASAL VERBS WITH Wor... 🧑‍🏫Learn English with short videos - 📝Daily use sentence - • Daily Use English Sent... 📝Daily use words - • "CACHINNATE" Daily Use... 📝 Daily use english sentence - • Daily Use English Sent... 📝 Different ways to say " I am Confused " • New Different Advanced...