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Comma practise

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  • What is the correct punctuation to join two complete sentences (independent clauses) without a coordinating conjunction?
    Apostrophe (')
    Comma (,)
    Colon (:)
    Semicolon (;)
  • In a date like "October 15, 2025," where are the commas required?
    Only after the day.
    After the day and after the year.
    Only after the year.
    Only after the month.
  • 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.
  • 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.
  • A comma should not be used to separate which two elements?
    A subject from its main verb.
    A dependent clause from an independent clause.
    Items in a list.
    An introductory word from the main clause.
  • 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.
  • 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.
  • 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.
  • Which grammatical structure requires a comma when it appears before the main clause?
    Verb phrase.
    Predicate adjective.
    Introductory element (phrase or clause).
    Subject of the sentence.
  • 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...
    subject-verb disagreement.
    pronoun errors.
    run-on sentences.
    missing articles.
  • An introductory element is usually placed at which part of the sentence?
    The beginning.
    In the middle, next to the verb.
    Next to the subject.
    The end.
  • 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 joins two clauses.
    When the sentence is very long.
    When the conjunction is 'but'.
    When it only joins two subjects.
  • What type of word requires a comma immediately after it when used at the start of a sentence (e.g., However, Likewise)?
    Adjective.
    Conjunctive adverb or transitional word.
    Modal verb.
    Noun.
  • 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.
  • 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.
  • 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 in the middle of the clause.
    not needed.
    needed after the clause.
    needed before the clause.
  • What is the name for the comma used before the final conjunction in a list (e.g., A, B, and C)?
    Serial comma.
    Oxford comma.
    Appositive comma.
    Coordinating comma.
  • Why is a comma needed after the transitional word Therefore when it starts a sentence?
    Because Therefore is a verb.
    To separate two independent clauses.
    It separates the transition from the main thought.
    Because it is a dependent clause.
  • 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.
  • 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.
  • 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.
  • Which rule applies to separating a list of adjectives that each modify the noun equally?
    Use a colon.
    Use a comma between them.
    Use a semi-colon.
    Do not use a comma.
  • 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.
  • 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.
  • 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.
  • An introductory word like "Yes" or "No" always requires a comma...
    at the end of the sentence.
    immediately after it.
    not at all.
    immediately before it.
  • What punctuation mark is used to enclose a non-defining relative clause?
    A single comma at the end.
    A single dash.
    A pair of semicolons.
    A pair of commas.
  • 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 main clause begins.
    After the main clause ends.
    Before the dependent clause begins.
  • 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 rule for using a comma after a long introductory prepositional phrase is usually when the phrase contains how many words?
    Two words.
    Six words.
    Four or more words.
    One word.
  • 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.
  • 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.
  • 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.
  • Which type of clause, often beginning with 'which' and adding extra detail, always needs commas around it?
    Defining relative clause.
    Main clause.
    Non-defining relative clause.
    Subordinate conjunction.
  • 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 primary function of a comma around an Appositive Phrase (e.g., Maria, the lead engineer...)?
    To separate the subject from the verb.
    To signal non-essential, explanatory information.
    To join two complete thoughts.
    To mark the beginning of a question.
  • 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.
  • Commas are placed before a coordinating conjunction (like and, but, or) when it joins two...
    phrases.
    verbs.
    independent clauses.
    dependent clauses.
  • Commas are used to separate three or more items in a list, known as a...
    complex sentence.
    series.
    main clause.
    parallel structure.
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