Who

Type I - Look at the following sentences:
(i)
I saw a woman.
She wore a red saree.
I saw a woman, who wore a red saree.

(ii)
Police arrested a thief.
The thief was running.
Police arrested a thief, who was running.

'Who' का Conjunction की तरह जब प्रयोग किया जाता है, तो अर्थ होता है: 'जो' या 'जिसने'

सामान्य नियम
(1) इस तरह के वाक्यों में, पहले वाक्य को पूरा लिखें। उसके बाद, दूसरे वाक्य के subject हेतु 'who' का प्रयोग करके वाक्य को भी पूरा लिख दें।
(2) यहाँ 'who' एक Subject की तरह कार्य कर रहा है।

Type II - Look at the following sentences:
(i)
Sheela secured the first position.
She belonged to Assam.
Sheela, who belonged to Assam, secured first position.
Or
Sheela, who secured first position, belonged to Assam.
(ii)
Ramesh failed again.
He did not work hard.
Ramesh, who didn't work hard, failed again.
Or
Ramesh, who failed again, didn't work hard.

सामान्य नियम
(1) इस तरह के वाक्यों को दो प्रकार से 'who' से जोड़ा जा सकता है, प्रथम प्रकार में पहले sentence का Subject लिखकर, उसके बाद 'who' लिखें फिर दूसरे sentence के subject को छोड़कर पूरा वाक्य लिख दें। फिर comma लगाकर पहले वाक्य के शेष भाग को लिख दें। यहाँ देखे कि दूसरे वाक्य के subject की जगह हमने 'who' का प्रयोग किया है।
(2) दूसरे तरीके में प्रथम वाक्य का Subject लिखकर 'who' लिखे एवं पहले वाक्य का शेष भाग लिख दें, उसके बाद comma लगाकर, दूसरे वाक्य के subject को छोड़कर शेष वाक्य लिख दें।

See more examples:
(i)
Ramesh is a good sportsman.
He was awarded a prize.
Ramesh, who was awarded a prize, is a good sportsman.

(ii)
Sita is a poor girl.
She stole my purse.
Sita, who stole my purse, is a poor girl.

(iii)
My brother is a banker.
He wrote a book.
My brother, who is a banker, wrote a book.

Whom

Look at the following sentences:
(i)
He is the manager.
I met him yesterday.
He is the manager whom I met yesterday.

(ii)
This is the girl.
The teacher punished her today.
This is the girl whom the teacher punished today.

Conjunction के रूप में 'whom' का अर्थ होता है 'जिसे' और 'जिसको'।

सामान्य नियम
(1) 'Whom' एक objective form pronoun है, यह Objective के रूप में वाक्य में प्रयुक्त किया जाता है। अतः वाक्य में जो pronoun, objective form में आया है उसके लिए 'whom' का प्रयोग होगा।
(2) सर्वप्रथम पहला वाक्य लिख दें फिर 'whom' लिखें। 'whom' का प्रयोग उस शब्द के बाद होता है जिसके लिए यह प्रयुक्त हुआ है। जैसे- वाक्य (i) में 'whom' का प्रयोग 'manager' के लिए होता है। अतः 'whom' को manager के बाद लिखना होगा।
(3) इसके बाद दूसरे वाक्य को pronoun हटाकर लिख दें।

See more examples:
(i) 

I know the girl.
He loves her.
I know the girl whom he loves.

(ii) 

This is the man.
The police arrested him.
This is the man whom the police arrested.

(iii) 

The clerk has just left out.
You want to meet him.
The clerk has just left out whom you want to meet.

Whose

Look at the following sentences:
(i) 

I know Suresh.
His son passed GATE.
I know Suresh whose son passed GATE.

(ii) 

This is the girl.
Her purse was stolen.
This is the girl whose purse was stolen,

Conjunction के रूप में 'whose' का अर्थ होता है 'जिसका'।

सामान्य नियम
(1) Whose एक Possessive case pronoun है। इसका प्रयोग वाक्य में आये Possessive case pronoun हेतु किया जाता है।
(2) सर्वप्रथम पहला वाक्य लिख दें, फिर 'whose' लिखें एवं उसके बाद दूसरे वाक्य के Possessive case pronoun को छोड़कर, शेष वाक्य को लिख दें।
(3) ध्यान रखें 'whose' का प्रयोग उस शब्द के साथ होगा जिसके लिए वह प्रयुक्त हुआ है। 'whose' के बाद noun अवश्य है।

See more examples:
(i) 

She is the girl.
Her purse was taken by a student.
She is the girl whose purse was taken by a student.

(ii) 

He is the boy.
A student took his umbrella yesterday.
He is the boy whose umbrella a student took yesterday.

(iii) 

Rani is a good girl.
Her father will give her a gift.
Rani, whose father will give her a gift, is a good girl.

Which

Look at the following sentences:
(i) 

I gave you a pen.
You have lost it.
I gave you a pen which you have lost.

(ii) 

He lives at Jaipur.
Jaipur is a beautiful city.
He lives in Jaipur which is a beautiful city.

'Which' का Conjunction की तरह जब प्रयोग किया जाता है, तो अर्थ होता है: 'जिसे' या 'जो कि'।

सामान्य नियम
(1) Which का प्रयोग निर्जीव वस्तुओं के लिए किया जाता है।
(2) यदि दूसरे वाक्य में it, that या वहीं noun वापस में repeat हुआ हो, तो उसके लिए 'which' का प्रयोग किया जायेगा।
(3) 'Which' का प्रयोग उस शब्द के साथ किया जाता है, जिसके लिए इसका प्रयोग हुआ है। सर्वप्रथम पहला वाक्य लिखे उसके बाद 'which' लिखें एवं दूसरे वाक्य में आये, that या repeated noun को छोड़कर शेष वाक्य लिखी

See more examples:
(i) 

I had a bat.
I gave it to my brother.
I had a bat which I gave to my brother.

(ii) 

This is the house.
I purchased it last year.
This is the house which I purchased last year.

(iii) 

Ritesh purchased a car.
It is very costly.
Ritesh purchased a car which is very costly.

When

Look at the following sentences:
(i) 

I was taking bath.
He came to my house.
I was taking bath when he came to my house.

(ii) 

He went to the market.
She returned from the office.
He went to market when she returned from office,

'When' का Conjunction के रूप में अर्थ होता है 'जब'।
'When' का प्रयोग तब किया जाता है, जब एक कार्य पूर्ण हो जाता है।

सामान्य नियम
(1) पहला वाक्य पूरा लिख दें, फिर 'When' लिखकर दूसरा वाक्य लिख दें। यदि किसी noun की पुनरावृत्ति (repeat) हुई है तो उसकी जगह he, she, they, it का प्रयोग करें।

See more examples:
(i) 

My father gifted me a bike.
I passed my B.A.
My father gifted me a bike when I passed my B.A.

(ii) 

He could swim across this river.
He was young.
He could swim across this river when he was young.

(iii) 

The madam rebuked the students.
The students made a noise.
The madam rebuked the students when they made a noise.

Where

Look at the following sentences:
(i) 

This is the house.
I lived here for three years.
This is the house where I lived for three years.

(ii) 

This is the hospital.
She was born here.
This is the hospital where she was born.

'Where' का Conjunction के रूप में अर्थ होता है 'जहाँ'।

सामान्य नियम
जब 'where' से दो वाक्यों को संयुक्त किया जाना होता है तो एक वाक्य में 'स्थान' को व्यक्त करने वाला शब्द (House, Hospital etc.) अवश्य प्रयुक्त होता है। सर्वप्रथम पहला वाक्य लिखें फिर इस स्थान सूचक शब्द के बाद में 'where' लिख दें, फिर दूसरे वाक्य को लिख दें। दूसरे वाक्य में प्रयुक्त शब्द here, there आदि को नहीं लिखें, इन्हें छोड़ दें। वास्तव में इनकी जगह ही 'where' प्रयुक्त होता है।

See more examples:
(i) 

This is the house.
My friend lives here.
This is the house where my friend lives.

(ii) 

She will go to Shimla.
Her parents live.
She will go to Shimla where her parents live. nor

(iii) 

This is the hotel 'Taj'.
I stayed here last year.
This is the hotel 'Taj' where I stayed last year.