Relative Clauses
Used to
Mixed Challenge
Defining or Non-Defining
Combine the Sentences
100
Complete the sentence:
A scientist _________ discovers new medicines can change the world.
A scientist WHO / THAT discovers new medicines can change the world.
100
Convert the sentence to the past using used to:
People drive cars that run on gasoline.
People USED TO drive cars that ran on gasoline.
100
Complete the sentence:
Glue, _____ was once made from natural materials, is now mostly synthetic.
Glue, WHICH was once made from natural materials, is now mostly synthetic.
100
Identify the type of clause:
Post-it notes, which were invented by accident, became very popular.
NON-DEFINING
100
Kevlar is a strong material. It is used in bulletproof vests.
Kevlar is a strong material THAT is used in bulletproof vests.
200
Choose the correct relative word:
The car ________ was invented in the 19th century changed transportation forever.
The car WHICH / THAT was invented in the 19th century changed transportation forever.
200
Correct the sentence:
People didn’t used to care about pollution.
People DIDN'T USE to care about pollution.
200
Correct the mistake:
There was a time where people didn’t care about pollution.
There was a time WHEN people didn’t care about pollution.
200
True or False?
Defining relative clauses use commas to separate extra information.
FALSE
200
Alexa is a virtual assistant. It can answer questions and control smart devices.
Alexa is a virtual assistant THAT can answer questions and control smart devices.
300
Rewrite using a relative clause:
The man _______ was a great inventor. He created the first telephone.
The man WHO created the first telephone was a great inventor.
300
What’s wrong with this sentence?
Did you used to play outside when you were a child?
I DIDN'T USE to like reading.
300
Create one sentence using USED TO and a relative clause:
Windshield wipers were operated manually. Now they work automatically.
Windshield wipers, which used to be operated manually, now work automatically.
300
Identify the type of clause:
Kevlar, which is incredibly strong, is used in protective gear.
NON-DEFINING
300
The managing director is visiting the company next week. He lives in Seattle.
The managing director, WHO lives in Seattle, is visiting the company next week.
400
Rewrite using a relative clause:
Windshield wipers were invented by a woman. Windshield wipers are essential for driving in the rain.
Windshield wipers, WHICH are essential for driving in the rain, were invented by a woman.
Windshield wipers, WHICH were invented by a woman, are essential for driving in the rain.
400
Rewrite using USED TO:
Nowadays, people buy electric cars, but in the past, they bought gasoline-powered cars.
People USED TO buy gasoline-powered cars, but now they buy electric ones.
400
Complete the sentence:
There was a time ______ people ______ ignored climate change, but now they are more aware of its impact.
There was a time WHEN people USED TO ignore climate change, but now they are more aware of its impact.
400
Choose the correct option and identify the type of clause:
The man (who / which) invented tactile paving was visually impaired.
The man WHO invented tactile paving was visually impaired. DEFINING
400
Factories release gases into the air. These gases cause pollution.
Factories release gases THAT cause pollution.
500
Correct the mistake:
Glue, whose is used in many industries, used to be made from natural materials.
Glue, WHICH is used in many industries, used to be made from natural mater
ials.
500
Answer the question in a complete sentence using USED TO:
How was transportation different 50 years ago?
People USED TO travel by train more often, and cars USED TO be slower and less fuel-efficient.
500
Rewrite using USED TO and a relative clause:
Cars today are electric. In the past, they ran on gasoline.
Cars, WHICH USED TO run on gasoline, are now electric.
500
Find the mistake and identify the type of clause:
The environment that we must protect, is in danger.
The environment, WHICH we must protect, is in danger. NON-DEFINING
500
I met an environmental activist. His work focuses on reducing pollution.
I met an environmental activist WHOSE work focuses on reducing pollution.
