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Comma practise

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  • What is the primary function of a comma around an Appositive Phrase (e.g., Maria, the lead engineer...)?
    To join two complete thoughts.
    To mark the beginning of a question.
    To separate the subject from the verb.
    To signal non-essential, explanatory information.
  • What punctuation mark is used to enclose a non-defining relative clause?
    A pair of semicolons.
    A single comma at the end.
    A single dash.
    A pair of commas.
  • This specific type of motor is inexpensive reliable and lightweight.
    This specific type, of motor is inexpensive reliable and lightweight.
    This specific type of motor is inexpensive, reliable, and lightweight.
    This specific type of motor is inexpensive reliable, and lightweight.
    This specific type of motor is inexpensive reliable and, lightweight.
  • When should you not put a comma before the coordinating conjunction in a simple compound subject (e.g., The engineer and the programmer worked late)?
    When it only joins two subjects.
    When it joins two clauses.
    When the conjunction is 'but'.
    When the sentence is very long.
  • The drone which was autonomous navigated the dense forest.
    The drone which was autonomous, navigated the dense forest.
    The drone which was, autonomous navigated the dense forest.
    The drone, which was autonomous navigated the dense forest.
    The drone, which was autonomous, navigated the dense forest.
  • Although the battery was old the robot still functioned perfectly.
    Although the battery was old the robot, still functioned perfectly.
    Although the battery, was old the robot still functioned perfectly.
    Although the battery was old the, robot still functioned perfectly.
    Although the battery was old, the robot still functioned perfectly.
  • Maria the lead engineer checked the hydraulics.
    Maria the lead engineer, checked the hydraulics.
    Maria, the lead engineer checked the hydraulics.
    Maria, the lead engineer, checked the hydraulics.
    Maria the lead engineer checked, the hydraulics.
  • Why is a comma needed after the transitional word Therefore when it starts a sentence?
    To separate two independent clauses.
    It separates the transition from the main thought.
    Because it is a dependent clause.
    Because Therefore is a verb.
  • Suddenly the machine stopped and a red warning light flashed.
    Suddenly the machine, stopped and a red warning light flashed.
    Suddenly the machine stopped, and a red warning light flashed.
    Suddenly the machine stopped and, a red warning light flashed.
    Suddenly, the machine stopped, and a red warning light flashed.
  • When listing actions in a narrative (e.g., She ran, jumped, and scored), the commas help avoid...
    run-on sentences.
    missing articles.
    pronoun errors.
    subject-verb disagreement.
  • In a date like "October 15, 2025," where are the commas required?
    Only after the day.
    Only after the month.
    After the day and after the year.
    Only after the year.
  • Dr. Lee who invented the machine won a Nobel Prize.
    Dr. Lee who invented the machine won, a Nobel Prize.
    Dr. Lee, who invented the machine won a Nobel Prize.
    Dr. Lee, who invented the machine, won a Nobel Prize.
    Dr. Lee who, invented the machine won a Nobel Prize.
  • The programmer debugged the code cleaned the sensors and rebooted the system.
    The programmer debugged the code cleaned the sensors and, rebooted the system.
    The programmer debugged the code cleaned the sensors and rebooted, the system.
    The programmer, debugged the code cleaned the sensors and rebooted the system.
    The programmer debugged the code, cleaned the sensors, and rebooted the system.
  • What is the name for the comma used before the final conjunction in a list (e.g., A, B, and C)?
    Oxford comma.
    Appositive comma.
    Coordinating comma.
    Serial comma.
  • The robot is heavy powerful and remarkably precise.
    The robot is heavy powerful and, remarkably precise.
    The robot is heavy powerful, and remarkably precise.
    The robot is heavy, powerful, and remarkably precise.
    The robot, is heavy powerful and remarkably precise.
  • When a sentence begins with a dependent clause (e.g., Although the battery was old...), where is the comma placed?
    In the middle of the dependent clause.
    Before the dependent clause begins.
    Before the main clause begins.
    After the main clause ends.
  • Commas are placed before a coordinating conjunction (like and, but, or) when it joins two...
    dependent clauses.
    verbs.
    phrases.
    independent clauses.
  • Commas are used to separate three or more items in a list, known as a...
    main clause.
    parallel structure.
    series.
    complex sentence.
  • If the adverbial clause comes after the main clause (e.g., The robot functioned perfectly although the battery was old.), a comma is usually...
    needed after the clause.
    needed in the middle of the clause.
    needed before the clause.
    not needed.
  • Which rule applies to separating a list of adjectives that each modify the noun equally?
    Use a colon.
    Use a semi-colon.
    Use a comma between them.
    Do not use a comma.
  • In the robotics lab they test prototypes every morning.
    In the robotics, lab they test prototypes every morning.
    In the robotics lab, they test prototypes every morning.
    In the robotics lab they, test prototypes every morning.
    In the robotics lab they test, prototypes every morning.
  • Finally the team solved the programming error.
    Finally, the team solved the programming error.
    Finally the team solved the programming, error.
    Finally the team solved, the programming error.
    Finally the, team solved the programming error.
  • An introductory word like "Yes" or "No" always requires a comma...
    immediately after it.
    immediately before it.
    at the end of the sentence.
    not at all.
  • The demonstration scheduled for Friday was postponed until Tuesday.
    The demonstration, scheduled for Friday, was postponed until Tuesday.
    The demonstration scheduled for Friday was postponed, until Tuesday.
    The demonstration, scheduled for Friday was postponed until Tuesday.
    The demonstration scheduled for Friday, was postponed until Tuesday.
  • The assembly line robot which was very fast required constant repair.
    The assembly line robot which was very fast required, constant repair.
    The assembly line robot which was, very fast required constant repair.
    The assembly line, robot which was very fast required constant repair.
    The assembly line robot, which was very fast, required constant repair.
  • What is the correct punctuation to join two complete sentences (independent clauses) without a coordinating conjunction?
    Colon (:)
    Comma (,)
    Apostrophe (')
    Semicolon (;)
  • Which type of clause, often beginning with 'which' and adding extra detail, always needs commas around it?
    Non-defining relative clause.
    Subordinate conjunction.
    Main clause.
    Defining relative clause.
  • However the new AI algorithm improved its efficiency dramatically.
    However the new AI algorithm improved its efficiency, dramatically.
    However the new, AI algorithm improved its efficiency dramatically.
    However, the new AI algorithm improved its efficiency dramatically.
    However the new AI, algorithm improved its efficiency dramatically.
  • A comma should not be used to separate which two elements?
    A dependent clause from an independent clause.
    Items in a list.
    A subject from its main verb.
    An introductory word from the main clause.
  • Since the failure was minor they quickly began the repairs.
    Since the failure was, minor they quickly began the repairs.
    Since the failure was minor, they quickly began the repairs.
    Since the failure, was minor they quickly began the repairs.
    Since the failure was minor they quickly, began the repairs.
  • The robot's casing made of reinforced carbon fibre resisted all damage.
    The robot's casing, made of reinforced carbon fibre, resisted all damage.
    The robot's casing, made of reinforced carbon fibre resisted all damage.
    The robot's casing made of reinforced carbon fibre resisted, all damage.
    The robot's casing made of reinforced, carbon fibre resisted all damage.
  • Before inserting the chip read the safety manual carefully.
    Before, inserting the chip read the safety manual carefully.
    Before inserting the chip, read the safety manual carefully.
    Before inserting, the chip read the safety manual carefully.
    Before inserting the chip read, the safety manual carefully.
  • What type of word requires a comma immediately after it when used at the start of a sentence (e.g., However, Likewise)?
    Modal verb.
    Adjective.
    Noun.
    Conjunctive adverb or transitional word.
  • The factory manager Ms. Chen approved the budget.
    The factory manager, Ms. Chen approved the budget.
    The factory manager, Ms. Chen, approved the budget.
    The factory manager Ms. Chen, approved the budget.
    The factory manager Ms. Chen approved, the budget.
  • An introductory element is usually placed at which part of the sentence?
    In the middle, next to the verb.
    Next to the subject.
    The end.
    The beginning.
  • We need wires sensors chips and power cells for the new model.
    We need wires sensors, chips and power cells for the new model.
    We need wires sensors chips and, power cells for the new model.
    We need, wires sensors chips and power cells for the new model.
    We need wires, sensors, chips, and power cells for the new model.
  • The robot's arm strong and flexible lifted the heavy crate.
    The robot's arm, strong and flexible lifted the heavy crate.
    The robot's arm strong, and flexible lifted the heavy crate.
    The robot's arm, strong and flexible, lifted the heavy crate.
    The robot's arm strong and flexible lifted, the heavy crate.
  • The rule for using a comma after a long introductory prepositional phrase is usually when the phrase contains how many words?
    Four or more words.
    Two words.
    Six words.
    One word.
  • After the update the drone performed complex manoeuvres.
    After the update, the drone performed complex manoeuvres.
    After the update the drone, performed complex manoeuvres.
    After the update the, drone performed complex manoeuvres.
    After the update the drone performed, complex manoeuvres.
  • Which grammatical structure requires a comma when it appears before the main clause?
    Subject of the sentence.
    Verb phrase.
    Introductory element (phrase or clause).
    Predicate adjective.
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