Grammar in OET – Key Rules and Common Mistakes

  • Studying to take the OET may be intimidating. However, the knowledge of grammar in OET can prevent mistakes that will bring us down. Grammar is very important in the Writing and Speaking sub-tests. We will learn the major grammar rules and some of the frequent grammatical errors that we must avoid in this blog. By putting our mind in the right posture, we will be able to perform better and feel much better on the test day.

Why Grammar Matters in the OET

OET is a healthcare language examination. It tests the extent to which we are able to communicate within the actual work environments. That is why OET writing grammar is the key. Good grammar helps us to write well, clearly, professionally, and easy to read. It demonstrates that we are able to cope with real-life communication with patients and other professionals.

 

The sentence itself can make a difference because of one grammar mistake. So, learning the OET grammar rules and applying them correctly can give us a strong advantage.

Key Grammar Rules for the OET

Let’s look at some important OET grammar tips we should always follow:

  • Use Correct Verb Tenses

We should never miss matching the verb tense with the context. Take an example, when we are describing a diagnosis that happened before, we are supposed to apply the past tense. Misuse of tenses distorts the reader and reduces our grades.  

Examples:

Correct (Past Tense): The doctor diagnosed pneumonia after reviewing the X-ray.

Incorrect (Present Tense for past event): The doctor diagnoses pneumonia after reviewing the X-ray.

Correct (Present Tense for current situation): The patient is experiencing severe headaches.

Incorrect (Past Tense for current event): The patient experienced severe headaches.

Correct (Future Tense for planned action): The surgeon will operate on the patient tomorrow.

Incorrect (Past Tense for future event): The surgeon operated on the patient tomorrow.
  • Subject-Verb Agreement

This is a common area where many candidates lose marks. A singular subject must take a singular verb, while a plural subject must take a plural verb.

Examples (Correct Usage):

The patient has a fever.
The doctor writes a prescription.
The report is ready for review.
She works in the emergency department.

 Examples (Incorrect Usage):

The patient have a fever.
The doctor write a prescription.
The report are ready for review.
She work in the emergency department.
 Tip: Always identify the subject first, then ensure the verb matches in number (singular/plural).
  • Use Articles Properly

Articles like “a,” “an,” and “the” may seem small, but they matter. In the OET writing sub-test grammar, missing or misusing articles can make sentences unclear. We should practice using them accurately.

Examples:

1. Incorrect: Patient was admitted to hospital yesterday.
Correct: The patient was admitted to the hospital yesterday.

2. Incorrect: She is nurse with five years of experience.
Correct: She is a nurse with five years of experience.

3. Incorrect: Doctor prescribed antibiotic for infection.
Correct: The doctor prescribed an antibiotic for the infection.

4. Incorrect: Patient has appointment at clinic tomorrow.
Correct: The patient has an appointment at the clinic tomorrow.
By using articles correctly, your writing becomes precise, professional, and easy to understand.
  • Sentence Structure and Punctuation

Sentence Structure and Punctuation
Simple, compound, and complex sentences should be used properly. Misplaced commas or long, run-on sentences can make writing hard to follow. Short and clear sentences are usually better.

Examples:

Simple sentence: The sun sets in the west.
Compound sentence: I wanted to go for a walk, but it started raining.
Complex sentence: Although it was raining, we decided to continue our hike.

Common mistake – run-on sentence:
Incorrect:  I love reading it helps me relax.
Correct:  I love reading because it helps me relax. (Complex sentence)
Correct: I love reading, and it helps me relax. (Compound sentence)

Misplaced comma example:
Incorrect: After eating, the movie was interesting. (Sounds like the movie ate something!)
Correct:  After eating, we watched an interesting movie.

  • Use Modals Properly

Modals (can, could, may, might, shall, should, will, would, must) express possibility, necessity, or ability. The choice of modal affects meaning.

Examples:

Possibility: The patient may recover within two weeks.
Necessity: You must wash your hands before touching the wound.
Advice: Doctors should encourage patients to exercise regularly.
Ability: The surgeon can perform complex heart surgeries.

  • Use Modals Properly

Modals (can, could, may, might, shall, should, will, would, must) express possibility, necessity, or ability. The choice of modal affects meaning.

Examples:

Possibility: The patient may recover within two weeks.
Necessity: You must wash your hands before touching the wound.
Advice: Doctors should encourage patients to exercise regularly.
Ability: The surgeon can perform complex heart surgeries.
 
Make a note of things you can talk about at ease in your brain. These may be your work, home, interests, or the latest happenings. Knowing what to talk about when it is required keeps the anxiety down.
 

I can help you with

Most frequent questions and answers

Create English immersion at home by consuming English media daily. Practice with online partners and join virtual conversation groups. Consistency matters more than location.

combine daily English speaking practice with multimedia learning. Use apps, watch videos, and have real conversations. Focus on communication over perfection for faster progress

Grammar study helps, but don’t let rules prevent speaking. Learn basic grammar patterns through examples rather than complex rules. Communication practice teaches grammar naturally.

Movies are excellent for learning natural speech patterns. Watch with English subtitles first, then without. Choose movies with clear dialogue and topics that interest you

Apps provide excellent support and structure for learning. However, real conversation practice is essential for true fluency. Apps should supplement, not replace, human interaction.

Fluency timelines vary by individual effort and starting level. With daily practice, basic conversational fluency often develops within 6-12 months. Advanced fluency takes longer but comes with consistent effort.

Use language exchange apps to find conversation partners. Join online English communities and forums. Practice speaking to yourself daily. Record your voice to track improvement.

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