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Comma practise

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