Who
Which
That
100

The teacher who is standing in front of the class is nice.

The teacher standing in front of the class is nice.

100

The book which is on the table is mine.

The book on the table is mine.

100

The dog that is barking is Miku.

The dog barking is Miku.

200

Students who are studying in the library have an exam next week.

Students studying in the library have an exam next week.

200

The plants which were watered today look healthy.

The plants watered today look healthy.

200

The movie that is showing at the theater is very popular.

The movie showing at the theater is very popular.

300

The boy who is running in the park is my brother.

The boy running in the park is my brother.

300

The dishes that were washed yesterday are clean.  

The dishes washed yesterday are clean.

300

The car that is parked outside belongs to my friend.

The car parked outside belongs to my friend.

400

This is the man who I was talking about.

This is the man I was talking about.

400

This painting which was created by a well known artist is beautiful.

This painting created by a well known artist is beautiful.

400

The woman that helped me yesterday is my aunt.

The woman helping me yesterday is my aunt.

500

That woman who is talking on the phone is my mom.

That woman talking on the phone is my mom.

500

Having music which is playing in the background is relaxing.

Having music playing in the background is relaxing.

500

The email that was sent this morning is important.

The email sent this morning is important.