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Complex Sentence Quiz (Level B1-B2) - Grammar Practice

⏱ Time: 07:30 📝 Questions: 15 📊 Level: B1, B2 📚 Type: Grammar ⭐ XP: up to +16 (on pass)

Preparing for an English exam? Practise Complex Sentence with 15 exercises at Level B1-B2. The questions mirror real exam formats — multiple choice, true/false, and matching — so you get familiar with the question styles while reviewing key grammar concepts.

⏱ You have 07:30 to answer 15 questions. The timer only starts when you click Begin.

Q1  15
Q1 15

Question 1: She stayed indoors ___ it was raining heavily outside.

Question 1 options
'because' is correct because it introduces a dependent clause showing reason, forming a complex sentence. 'However' is a linking adverb, not a subordinating conjunction. 'But' and 'and' are coordinating conjunctions used in compound sentences, not complex ones.
Q2 15

Question 2: ___ he finished his homework, he went out to play with his friends.

Question 2 options
'After' is correct because it is a subordinating conjunction that introduces a dependent clause showing time sequence, creating a complex sentence. 'So', 'yet', and 'but' are coordinating conjunctions and cannot introduce a dependent clause.
Q3 15

Question 3: In a complex sentence, when the dependent clause comes before the independent clause, a comma must be used to separate the two clauses.

Question 3 options
True because the standard rule for complex sentences states that a comma is required after the dependent clause when it precedes the independent clause. When the independent clause comes first, no comma is needed.
Q4 15

Question 4: Why would a writer choose to use a complex sentence instead of a simple sentence?

Question 4 options
'To add extra information about the main idea using a dependent clause' is correct because complex sentences allow writers to show relationships between ideas such as reason, time, or condition. Simple sentences can only express one action by one subject.
Q5 15

Question 5: Arrange the words to make a correct sentence:

Question 5 options
  • Although the weather was cold,
  • to go hiking
  • they decided

Drag items or use arrows to arrange them in the correct order.

The correct order is 'Although the weather was cold, they decided to go hiking.' because when the dependent clause introduced by 'although' comes first, it must be followed by a comma before the independent clause.
Q6 15

Question 6: Which sentence is grammatically correct?

Question 6 options
'He called the doctor because he felt very sick' is correct because 'because' is a subordinating conjunction that correctly links the independent clause to the dependent clause. The other options incorrectly use 'because' without a subject-verb structure, omit the conjunction, or misplace the comma.
Q7 15

Question 7: Student A says: 'I want to explain why I was late for class.' Which sentence best fits what Student A wants to say?

Question 7 options
'I was late for class because the bus broke down' is correct because 'because' introduces a dependent clause that directly explains the reason for being late, which is the communicative goal. The other options express contrast, condition, or time rather than reason.
Q8 15

Question 8: Which sentence is a complex sentence and NOT a compound sentence?

Question 8 options
'She smiled when she heard the good news' is correct because it contains one independent clause and one dependent clause introduced by the subordinating conjunction 'when'. The other options use coordinating conjunctions ('and', 'but', 'so') to join two independent clauses, making them compound sentences.
Q9 15

Question 9: Put the words/clauses in the correct order:

Question 9 options
  • before
  • she goes to sleep
  • My sister reads every night

Drag items or use arrows to arrange them in the correct order.

The correct order is 'My sister reads every night before she goes to sleep.' The independent clause comes first, followed by the dependent clause introduced by 'before'. No comma is needed when the independent clause precedes the dependent clause.
Q10 15

Question 10: The teacher will explain the lesson again ___.

Question 10 options
'if the students do not understand it' is correct because 'if' is a subordinating conjunction introducing a conditional dependent clause, which naturally completes the independent clause. The other options are independent clauses that would require a coordinating conjunction, creating a compound sentence instead.
Q11 15

Question 11: Which statement about complex sentences is true?

Question 11 options
'A complex sentence contains exactly one independent clause and at least one dependent clause' is correct. A complex sentence must have one — and only one — independent clause; the dependent clause cannot stand alone as a complete sentence.
Q12 15

Question 12: Rewrite as a complex sentence: 'It was cold. I wore a coat.' → I wore a coat ___.

Question 12 options
'because it was cold' is correct because the transformation requires a subordinating conjunction to join the reason clause to the main clause, making it a complex sentence. 'And it was cold' creates a compound sentence. 'But it was cold' creates contrast, which changes the meaning. 'It was cold' alone repeats the original simple sentence.
Q13 15

Question 13: Match each sentence to the correct grammar label.

Question 13 options
Even though she was tired, she finished the report.
Since he missed the bus, he took a taxi to work.
When the alarm rang, everyone left the building.
She will help you if you ask her politely.
Dependent clause of time
Dependent clause of condition
Dependent clause of reason
Dependent clause of concession

Select an item on the left, then tap its match on the right.

Subordinating conjunctions each introduce a different type of dependent clause: 'although/even though' = concession, 'because/since' = reason, 'when/while/after' = time, 'if/unless' = condition.
Q14 15

Question 14: A complex sentence can contain more than one dependent clause as long as it has only one independent clause.

Question 14 options
True because the definition of a complex sentence requires exactly one independent clause, but it can include two or more dependent clauses. For example: 'Since I was hungry and because there was no food at home, I went to a restaurant' contains one independent clause and two dependent clauses.
Q15 15

Question 15: Which sentence most effectively uses a complex sentence to show contrast between two ideas?

Question 15 options
'Although he studied hard, he did not pass the exam' is correct because 'although' introduces a concessive dependent clause, creating a contrast between effort and result within a complex sentence. The other options express time, reason, or condition rather than contrast.