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      Using the comma rules in non-finite complex sentences

      Lesson details

      Learning outcome

      I can use a comma to demarcate a main clause from a non-finite clause in a non-finite complex sentence.

      Key learning points

      1. A non-finite clause joined to a main clause forms a non-finite complex sentence.
      2. The non-finite clause denotes ongoing action that relates to the subject of the main clause.
      3. The action of the non-finite clause occurs simultaneously to the action of the main clause.
      4. The non-finite clause can come first in the complex sentence followed by the main clause or vice versa.
      5. A comma is always used to demarcate the non-finite clause from the main clause despite its position in the sentence.

      Keywords

      • Non-finite clause - a type of subordinate clause that can start with a verb in the progressive tense

      • Progressive tense - a tense that denotes ongoing action

      • Comma - a punctuation mark used to demarcate the non-finite clause from the main clause in a non-finite complex sentence

      • Main clause - a group of words that contains a verb and makes complete sense

      • Non-finite complex sentence - a sentence formed of a main clause and a non-finite subordinate clause

      Common misconception

      Pupils may not include the subject of the non-finite clause at the start of the main clause.

      Explain that the person doing the non-finite clause must be mentioned at the start of the main clause.

      Teacher tip

      Encourage pupils to interrogate their non-finite complex sentences - could the actions be done simultaneously? Is the person mentioned after the comma the one doing the non-finite clause?

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which of the following are found in a non-finite complex sentence?

      Correct answer: a main clause
      a relative clause
      an adverbial clause
      Correct answer: a non-finite clause

      Q2.
      Which of the following contain a non-finite (-ing) clause?

      As we looked up, we saw bright stars shining.
      Correct answer: Looking up, we saw bright stars shining.
      She shook our hands when she got up from her chair.
      Correct answer: She shook our hands, getting up from her chair.

      Q3.
      Which of these non-finite complex sentences are correctly formed?

      Looking up, the stars were shining.
      Correct answer: Looking up, I saw the stars were shining.
      Correct answer: Running down the canal towpath, she spotted a brilliant kingfisher.
      Running down the canal towpath, a brilliant kingfisher flew past.

      Q4.
      Match the type of complex sentence to the type of word it might require.

      Correct Answer:adverbial complex sentence,subordinating conjunction

      subordinating conjunction

      Correct Answer:relative complex sentence,relative pronoun

      relative pronoun

      Correct Answer:non-finite complex sentence,progressive tense verb with -ing suffix

      progressive tense verb with -ing suffix

      Q5.
      Match the main clauses to the non-finite (-ing) clauses that could follow them.

      Correct Answer:We walked along the beach,, searching for interesting shells.

      , searching for interesting shells.

      Correct Answer:The children dashed outside,, hoping to use the football pitch.

      , hoping to use the football pitch.

      Correct Answer:Mrs Begum smiled,, seeing that we were eager to finish the story.

      , seeing that we were eager to finish the story.

      Q6.
      Which main clause would best complete this non-finite complex sentence? 'Diving into the water, __________.'

      I leaped into the air.
      Correct answer: I felt as if I had been plunged into an ice bath.
      I got ready to swim.

      6 Questions

      Q1.
      Which of the following will we always find in a non-finite (-ing) complex sentence?

      Correct answer: a main clause
      Correct answer: a progressive tense verb with an -ing suffix
      Correct answer: a comma
      a relative clause

      Q2.
      Match the type of complex sentence to the word that might start its subordinate clause.

      Correct Answer:non-finite complex sentence,rushing

      rushing

      Correct Answer:adverbial complex sentence,when

      when

      Correct Answer:relative complex sentence,who

      who

      Q3.
      Match each type of complex sentence to an example.

      Correct Answer:relative complex sentence,The hill, which was very steep, was over 700m high.

      The hill, which was very steep, was over 700m high.

      Correct Answer:adverbial complex sentence,When we got to the top of the hill, we rested a while.

      When we got to the top of the hill, we rested a while.

      Correct Answer:non-finite complex sentence,Laying on the ground, we tried to catch our breath.

      Laying on the ground, we tried to catch our breath.

      Q4.
      Which of the following is true of a non-finite (-ing) complex sentence?

      There is never a comma between the main clause and the non-finite (-ing) clause.
      Correct answer: There is always a comma between the main clause and the non-finite clause.
      There is sometimes a comma between the main clause and the non-finite clause.

      Q5.
      Tick all the non-finite (-ing) complex sentences that have the correct commas.

      Waiting by the door I listened to their conversation.
      Correct answer: Waiting by the door, I listened to their conversation.
      Correct answer: The dog barked loudly, hoping to get our attention.
      The dog barked loudly hoping to get our attention.

      Q6.
      Tick all the non-finite (-ing) complex sentences that have the correct commas used for all purposes.

      Correct answer: Stepping into the warm, humid greenhouse, I loosened my tie.
      Stepping into the warm humid greenhouse, I loosened my tie.
      She stomped into the room, barging past Jun Sam and Jacob.
      Correct answer: She stomped into the room, barging past Jun, Sam and Jacob.

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