Negative Sentences (Grade 12 NSC Matric English FAL): Revision Notes
Negative Sentences
Understanding negative sentences
A negative sentence tells us the opposite of what a positive statement says. When we want to show that something is not true, did not happen, or does not exist, we create negative sentences to express this meaning clearly.
Think of negative sentences as the "no" version of positive statements. They help us deny, refuse, or contradict information in our writing and speech.
Negative sentences are essential tools in English grammar that allow us to express the opposite meaning of positive statements. Understanding how to form them correctly is crucial for clear communication.
How to create negative sentences
Creating negative sentences follows a clear pattern that you can apply to any positive statement. The process involves using helping verbs and the word "not" to transform the meaning.
The basic method
Here's the step-by-step process for creating negative sentences:
- Add a helping verb - Choose from 'do', 'be', or 'have' depending on your main verb and tense
- Insert 'not' - Place it directly after the helping verb
- Keep the original tense - Make sure your sentence stays in the same time period
- Adjust the main verb - Change its form when needed
Worked Example: Basic Transformation
- Positive: She understands the topic
- Negative: She does not understand the topic
Notice how we added 'does' as the helping verb, followed by 'not', and changed 'understands' to 'understand'.
Key rules for forming negatives
Using helping verbs effectively
The helping verbs 'do', 'be', and 'have' are your main tools for creating negative sentences. Each one serves different purposes depending on the sentence structure.
For present simple and past simple sentences, you'll use:
- 'do' or 'does' for present tense
- 'did' for past tense
Worked Example: Present Tense Negative
- Positive: He belongs to the team
- Negative: He does not belong to the team
Managing verb forms in negatives
When you use 'do', 'does', or 'did' as helping verbs, remember this important rule: the main verb always returns to its base form. This means no -s, -ed, or other endings on the main verb.
For continuous and perfect tenses, the process is simpler - just add 'not' after the existing helping verb without changing the main verb form.
Critical Rule: When using 'do', 'does', or 'did' as helping verbs, the main verb must return to its base form. This is one of the most common mistakes students make when forming negative sentences.
Special rule for third-person singular
In present tense sentences with third-person subjects (he, she, it), follow this pattern:
- Use 'does' as the helping verb
- Remove the -s ending from the main verb
Worked Example: Third-Person Singular
- Positive: He understands body language
- Negative: He does not understand body language
Notice how 'understands' becomes 'understand' when we add 'does not'.
Practical examples
Converting positive to negative sentences
Let's work through several examples to see these rules in action:
Worked Example 1: Present Tense
- Positive: The child belongs with her mother
- Negative: The child does not belong with her mother
(Added 'does not' and kept 'belong' in base form)
Worked Example 2: Past Tense
- Positive: She became a Dame Commander of the Order of the British Empire
- Negative: She did not become a Dame Commander of the Order of the British Empire
(Used past tense 'did not' and changed 'became' to 'become')
Worked Example 3: Past Tense Simple
- Positive: Words failed me
- Negative: Words did not fail me
(Applied past tense rule with 'did not')
Worked Example 4: Third-Person Singular Present
- Positive: Robert understands body language very well
- Negative: Robert does not understand body language very well
(Third-person singular: used 'does not' and removed -s from main verb)
Worked Example 5: Present Tense with Third-Person Subject
- Positive: A well-balanced diet excludes vegetables
- Negative: A well-balanced diet does not exclude vegetables
(Present tense transformation with third-person subject)
Exam tips
Study Tips for Success:
- Always check your verb forms - Main verbs should be in base form when using do/does/did
- Match your tenses - Keep the same time reference as the original sentence
- Remember the third-person rule - Drop the -s when using 'does'
- Practice with different sentence types - Try simple, compound, and complex sentences
Key Points to Remember:
- Negative sentences express the opposite meaning of positive statements
- Use auxiliary verbs ('do', 'be', 'have') plus 'not' to form negatives
- Main verbs return to base form when using 'do', 'does', or 'did'
- In present tense with third-person singular subjects, use 'does' and drop the -s from the main verb
- Keep the original tense of your sentence when converting to negative form