200 English Grammar Mistakes!: A workbook of Common Grammar and Punctuation Errors with Examples, Exercises and Solutions So You Never Make Them Again

Even
though he made $400 million
, he remains grounded
," 
the highlighted part is
the dependent clause. Below are some common errors associated with
clauses:
A defining subordinate clause should be introduced with “that,” not “which."
Incorrect: The river 
which
flows through Lisbon is murky.
Correct: 
The river 
that
flows through Lisbon is murky.
A non-defining subordinate clause should be introduced with “which” not
“that” while being separated with two commas.
Incorrect: The Nigerian river Benue, 
that
flows through Niger, is murky
and turbid.
Correct: 
The Nigerian river Benue, 
which
flows through Niger, is murky
and turbid.
A defining subordinate clause should be introduced with “who,” not “whose."
Incorrect: The American military officer 
whose 
defeated the Italians
became the president.
Correct: 
The American military officer 
who 
defeated the Italians became
the president.
A non-defining subordinate clause should be introduced with “whose,” not
“who” while being separated with two commas.
Incorrect: The King of England
, who
kingship was the reward for his
heroics, was an unusual man.
Correct: 
The King of England
, whose
kingship was the reward for his
heroics, was an unusual man.

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MCQs: Choose the appropriate options from the statements below:
The Duke of Wellington, _______ peerage was the reward for his patriotism,
was a great man. (A. who B. whose)
Answer: B
The teacher ____ came yesterday is my friend. (A. that B. which)
Answer: A
Run-Ons
A run-on sentence is a common error as a result of merging two sentences
together without the right punctuation. The comma splice or comma fault is
the most common run-on sentence. A comma splice occurs when a comma is
used to separate two sentences in an inappropriate manner.
Examples:
Craig is a brilliant soccer player, he dances in an amazing way.
My mom is such a good cook, she gets angry at the slightest provocation.
To avoid these kinds of errors, do the following:
Use a semicolon.
Incorrect: Racism is not exclusive to any