Agriculture
Protecting Cows—and People—from a Deadly Disease
Watching out for vultures
Fast-flying fungal spores
Amphibians
Tree Frogs
Frogs and Toads
Toads
Animals
A Microbe Nanny for Young Wasps
Who's Knocking?
Big Squid
Behavior
Baby Number Whizzes
Making light of sleep
Puberty gone wild
Birds
Ducks
Swans
Quails
Chemistry and Materials
Sweeeet! The Skinny on Sugar Substitutes
Smelly Traps for Lampreys
Pencil Thin
Computers
Toxic Dirt + Avian Flu = Science Fair Success
The Earth-bound asteroid scientists saw coming
Programming with Alice
Dinosaurs and Fossils
Dinosaur Eggs-citement
Feathered Fossils
An Ancient Spider's Web
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Polar Ice Feels the Heat
Rodent Rubbish as an Ice-Age Thermometer
Hot Summers, Wild Fires
Environment
Lessons from a Lonely Tortoise
Sounds and Silence
Cactus Goo for Clean Water
Finding the Past
Writing on eggshells
Stone Tablet May Solve Maya Mystery
Fakes in the museum
Fish
Tiger Sharks
Sharks
Parrotfish
Food and Nutrition
Chew for Health
Chocolate Rules
Turning to Sweets, Fats to Calm the Brain
GSAT English Rules
Adjectives and Adverbs
Order of Adjectives
Pronouns
GSAT Exam Preparation Jamaica
Results of GSAT are in schools this week
Ministry of Education Announces 82 GSAT Scholarships for 2010
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Scholarship
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
Setting a Prime Number Record
Play for Science
Human Body
Dreaming makes perfect
Kids now getting 'adult' disease
Gut Microbes and Weight
Invertebrates
Caterpillars
Invertebrates
Leeches
Mammals
Primates
Sheep
Seal
Parents
What Not to Say to Emerging Readers
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
Physics
Project Music
Strange Universe: The Stuff of Darkness
Extra Strings for New Sounds
Plants
Fastest Plant on Earth
Cactus Goo for Clean Water
Plants Travel Wind Highways
Reptiles
Asp
Pythons
Box Turtles
Space and Astronomy
Ringing Saturn
A Smashing Display
Holes in Martian moon mystery
Technology and Engineering
Searching for Alien Life
Squeezing Oil from Old Wells
Morphing a Wing to Save Fuel
The Parts of Speech
Pronouns
What is a Preposition?
Problems with Prepositions
Transportation
Are Propellers Fin-ished?
Morphing a Wing to Save Fuel
Charged cars that would charge
Weather
The solar system's biggest junkyard
Antarctica warms, which threatens penguins
Arctic Melt
Add your Article

Who vs. That vs. Which

Rule 1

Who refers to people. That and which refer to groups or things.

Examples:
Anya is the one who rescued the bird.
Lokua is on the team that won first place. 
She belongs to an organization that specializes in saving endangered species.

Rule 2

That introduces essential clauses while which introduces nonessential clauses.

Examples:
I do not trust products that claim "all natural ingredients" because this phrase can mean almost anything.
We would not know which products were being discussed without the that clause.
The product claiming "all natural ingredients," which appeared in the Sunday newspaper, is on sale.
The product is already identified. Therefore, which begins a nonessential clause.

NOTE: Essential clauses do not have commas surrounding them while nonessential clauses are surrounded by commas.

Rule 3

If this, that, these, or those has already introduced an essential clause, you may use which to introduce the next clause, whether it is essential or nonessential.

Examples:
That is a decision which you must live with for the rest of your life.
Those ideas, which we've discussed thoroughly enough, do not need to be addressed again.

NOTE: Often, you can streamline your sentence by leaving out which.

Example:
That is a decision which you must live with for the rest of your life.

Better:
That is a decision you must live with for the rest of your life.

 

Who vs. That vs. Which









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