Relative Clauses (Missing Relative Pronouns)
Complement Clauses (Incorrect Use or Omission of "That")
Adverbial Clauses (Incorrect Subordinators)
Relative Clauses (Wrong Relative Pronoun)
Mixed Clause Errors (Relative, Complement, and Adverbial)
100

The girl won the competition is my cousin  

The girl who won the competition is my cousin.

100

She said he was tired yesterday.

She said that he was tired yesterday.

100

Because it was raining but we went inside.

Because it was raining, we went inside.

100

The woman which called you is my aunt.

The woman who called you is my aunt.

100

I know who that she is coming tomorrow.

I know that she is coming tomorrow.

200

The teacher explained the lesson was absent yesterday.

The teacher who explained the lesson was absent yesterday.

200

I believe who she is honest.

I believe that she is honest.

200

Although she was tired because she finished the race.

Although she was tired, she finished the race.

200

The boy whose won the prize is my friend.

The boy who won the prize is my friend.

200

The student which forgot his homework because was late.

The student who forgot his homework was late.

300

The man repaired my bike is very kind.

The man who repaired my bike is very kind.

300

They think if he will arrive soon.

They think that he will arrive soon.

300

If it rains so we will stay home.

If it rains, we will stay home.

300

The dog who barked all night belongs to my neighbor.

The dog that barked all night belongs to my neighbor.

300

She believes who the answer is correct.

She believes that the answer is correct.

400

The book I borrowed it was very interesting.

The book I borrowed was very interesting.

400

He told that she happy.

He told me that she was happy.

400

Since he studied but he failed the exam.

Although he studied, he failed the exam.

400

The students which passed the exam were happy.

The students who passed the exam were happy.

400

The teacher that explained the lesson was difficult.

The lesson that the teacher explained was difficult.

500

The movie we watched it last night was exciting.

The movie we watched last night was exciting.

500

We know that is true.

We know that it is true.

500

When I arrived because everyone was sleeping.

When I arrived, everyone was sleeping.

500

The car who is parked outside is mine.

The car that is parked outside is mine.

500

Although it was cold because we played soccer.

Although it was cold, we played soccer.