When is a time-relative pronoun that joins a modifying clause. In the example below, the clause modifies a time.
The yearswhen the "flower children" thrived were the 1960s. The "flower children" thrivedthen.
The daywhen the concert takes place is Sunday. The concert takes place then.
The hour when the parade begins is 12:30 p.m. The parade begins then.
WHERE - REPLACES AN OBJECT NOUN
Where is a location-relative pronoun that joins a modifying clause. In the example below, the clause modifies a place.
The citywhere "flower children" lived was San Francisco. The "flower children" livedthere.
The sitewhere the concert takes place is Golden Gate Park. The concerts are heldthere.
The streetwhere the parade begins is Broadway. The parade takes placethere.
take place (v. exp.) – occurs, happens
site (n.) – location
thrive (v.) – live and grow, expand, flourish
Forming a When/Where-Clause
Replacing the Object Noun
When / Where
WHEN
When replaces the object noun in the modifying clause, and the clause is placed after the noun that it modifies.
The year was memorable.You were born in that year. The year was memorable. You were born then.
OBJECT of MOD CLS
The year
you were born then
was memorable.
when
The year
when you were born
was memorable.
WHERE
Where replaces the object noun in the modifying clause, and the clause is placed after the noun that it modifies.
The city is beautiful.You live in the city. The city is beautiful. You live there.
OBJECT of MOD CLS
The city
you live there
is beautiful.
where
The city
where you live
is beautiful.
memorable (adj.) – special in memory
When / Where Clauses
Preposition + Which
Where can replace:
AT WHICH
ON WHICH
IN WHICH
exact address or
residence
floor, street
location, geographical place
city, area, state,
country
the houseat which I work is nearby.
the flooron which I work is the twelfth.
the roomin which I work is here.
the buildingat which I work is nearby.
the street on which I work is nearby.
the cityin which I work is nearby.
the addressat which I work is 310 Elm
St.
the corneron whichI work
the statein which I pay taxes is Utah.
the locationat whichI work
the islandon whichI work
the countryin which I pay taxes is the U.S.A.
When can replace:
AT WHICH
ON WHICH
IN WHICH
hour, time of the
day
day
month, season, year,
decade, century
the timeat which I eat lunch is noon.
the dayon which I was born was snowy.
the month in which I pay taxis is April.
the hourat which I eat lunch is 12:00–1:00 p.m.
the day on which I was born was Tuesday.
the seasonin which I vacation is summer.
the timeat which I eat lunch is 12:00 p.m.
the dayon whichI started school was June 1.
the yearsin which I worked were 2000-2011.
When/Where-Clause
Punctuation
An identifying vs. Nonidentifying Clause
IDENTIFYING CLAUSE
A clause that identifies the noun before it (tells you which one) is not set off with commas. No comma(s) is/are used. The object pronoun when or where may be omitted in an identifying clause.
The areawherethe "flower children" lived was a colorful section of San Francisco.
The yearswhenthe "flower children" thrived was a colorful decade.
NONIDENTIFYING CLAUSE
A clause that adds extra, nonidentifying information is set off with comma(s). The object pronoun when or where is required (cannot be omitted) in a nonidentifying clause.
The Haight,wherethe "flower children" lived, was a colorful area in San Francisco.
The 1960s, when the "flower children" thrived, was a colorful decade.
An identifyingclause adds information or narrows the noun to a specific one, group or lot. The clause helps by telling us which one. No commas are used. It is also called restrictive, essential , or necessary clause. See That vs. WhichSome or All.
A nonidentifying clause adds extra information about a noun already identified by other means, for example, by name, by shared knowledge or context. The clause, a comment, is set off with commas (before and, if necessary, after the clause). It is also called nonrestrictive, nonessential, or unnecessary clause. See Commas – comments.
¹An object relative pronoun cannot be omitted from (left out of) a nonidentifying clause.
Practice 1
The Right Time or Place
Change when or where to a which-clause
Select the response from the list that best completes the sentence.
Compare your response to the answer by clicking the "check 1-10" button at the bottom, or click the "check" button as you go.
Practice 2
The Ferry Building
Read the Paragraphs
Every day hundreds of people pass through the San Francisco Ferry Building, a place where a variety of products and services are available. The San Francisco Ferry Building is the place where commuters catch their ferries at. It is also a place where people come to walk and watch activity on the bay. The area inside in which people shop for food is also where people can find restaurants and shops. Shops where you can buy meat, cheese, bread, mushrooms, plants, coffee, herbs, and so on.
The Ferry Building was built at a time there were no bridges in 1875. People had to take a train to the Berkeley or Oakland ferry terminals, there they would catch a ferry to San Francisco. When the Bay Bridge opened in 1936, the Ferry Building became an unnecessary place at which the ferries were forgotten. In the 1970s, when the traffic on the bridge made the commute difficult, ferry boat service resumed. Now the Ferry Building serves as an activity center where San Franciscans shop, eat, catch transportation, and relax near the water.
available (adj.) – easy to find or get
commuter (n.) – a person traveling to and from a place of work
ferry (n.) – a commercial service with terminals and boats for transporting persons, automobiles across small bodies of water.
resume (v.) – restart
terminal (n.) – station
variety (n.) – having different kinds or types of things
Decide whether the sentence is correct or incorrect.
Select the "correct" or "incorrect" option as your response.
Compare your response to the answer by clicking the "check 11-20" button at the bottom, or click the "check" button as you go.
The Galata Bridge in Istanbul is a unique location in the world. It spans the Golden Hornat a sitein which a natural harbor forms. It is the exact placein which the Bosphorus flows into the sea of Marmara. It is also the place at which the old Istanbul meets the new.
This is the fifth bridge in this location. The last bridge was destroyed in 1992 the year in which a fire badly damaged it. The bridge has three car lanes and one lane on which trams go.
In the evening, the time in which fisherman come to catch their evening meals, the bridge becomes a bustling place. Sunset is also the time at which the faithful are called to prayer. Tourists and locals walk along the first deck on which there are a number of restaurants and shops. Fisherman stand side by side at the railing at which they cast their lines into the water. Never is there a timeat which the bridge is not completely occupied and bustling with people.
bustling (adj.) – busy, constantly moving
cast (v.) – throw, especially in fishing He cast his fish net.
deck (n.) – a floor or roadway on a bridge
harbor (n.) – a location where boats enter away from strong wanter currents
line (n.) – plastic-like string that winds around the reel on a fishing pole
locals (n.) – local people who live nearby
occupied (adj.) – in use
railing (n.) – the metal fence or barrier that keeps people from falling off
spans (v.) – crosses; reaches across; goes across
unique (adj.) – one of a kind
Change the which-clause to a when or where clause.
Edit the sentence(s) in the text box.
Compare your response to the answer by clicking the "check 21-30" button at the bottom, or click the "check" button as you go.