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English Grammar and Exercises for ESL learners.


WHO - WHOSE - WHOM - THAT - WHICH - WHERE
Relative Pronouns and Adverbs



Relative pronouns and relative adverbs introduce relative clauses.
'Who' - 'whose' - 'whom' - 'that' and  'which' - are relative pronouns.
'Where' is a relative adverb.

There is often confusion about the use of who, whose, whom, that, which or where.

  • We use who when referring to people or when we want to know the person.
    • The person who answered the phone was very helpful.
    Who ate all the chocolates?

  • We use which to refer to a thing or an idea, and to ask about choices.
    • My car, which is 20 years old, isn't worth much.
    Which size would you like, small, medium or large?

  • We use that for both a person and a thing/idea.
    • I'm talking about the person that I saw yesterday.
    • This is the style that I want to use.

  • Whose refers to ownership.
    Whose dictionary is this?
    • There's the girl whose car was stolen.

  • Whom: 
    When who is the object of a verb, whom, with a preposition, can be used instead,
    but it is formal and rather old-fashioned. In modern speech, we use who, or we leave out
    the pronoun.
    • You are referring to a person who no longer works here.
    • The person to whom you are referring no longer works here.
    • The person (who) you are you referring to no longer works here.

    Whom is always used when it is preceded by quantifiers such as all of, both of, few of,
    many of, several of, etc. For example:
    • He addressed the spectators, most of whom remained seated.

  • Where (relative adverb) refers to places and locations.
    Where is the station please?
    • That's where I spent my childhood.

Examples of use :


I know a woman. She speaks 6 languages. I know a woman who speaks 6 languages.
   
I know a woman.  Her husband speaks 6 languages. I know a woman whose husband speaks 6 languages.
   
I spoke to a person yesterday. The person to whom I spoke yesterday.(formal)
The person (who / that) I spoke to yesterday. (informal)
I live in a house.  It is 200 years old. I live in a house which / that is 200 years old.
   
That's the hotel. We stayed there last year. That's the hotel where we stayed last year.
That's the hotel that we stayed in  last year.
   

When can we leave out relative pronouns  (who, whom,  which, that)?

In conversational English relative pronouns can be omitted when they are the object of a relative clause.  In a formal context it is usually wiser to leave the relative pronoun.

Subject Verb Object
Tom drives a red truck
→ The person who drives a red truck is called Tom.
In this sentence 'who' refers to the subject so it cannot be omitted.

→ The truck (that) Tom drives is red.
In this sentence 'that' refers to the object (the truck) so it can be omitted.
 

Compare :
  • The woman who wanted to see me is a doctor. ('Woman' is the subject of the sentence)
  • The woman (that) I wanted to see is a doctor. (Here 'woman' is the object, 'I" is the subject.)


RELATIVE PRONOUNS and RELATIVE CLAUSES

A relative pronoun is used to introduce a relative clause.
A relative clause is a description for a noun.
The description comes after the noun to identify it or give more information.
  • A defining relative clause identifies a noun. It provides information necessary for identification.
    (These clauses are also called identifying relative clauses or restrictive relative clauses)
    Defining relative clauses are not put in commas.

    The woman who is speaking is a friend of mine.

    The clause "who is speaking" clarifies which woman you are referring to.

  • A non-defining relative clause adds information which is not essential for identification purposes.
    (These clauses are also called non-identifying relative clauses or non-restrictive relative clauses.)
    Non-defining relative clauses are put in commas.

    Ms. Smith, who is a friend of mine, is speaking about sustainable resources.

    The clause "who is a friend of mine" adds non-essential information.

    N.B. 'That' cannot replace 'who' to introduce a non-defining relative clause.

    You cannot say:
    Ms. Smith, that is a friend of mine, is speaking about sustainable resources.


see also: who-whom


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