Learn when to use formal and informal English in IELTS test

Using formal and informal English correctly is essential for achieving a high score in the IELTS test. While IELTS primarily assesses language proficiency, it also evaluates your ability to adapt language to the right context — an important skill for effective communication in academic, professional, and everyday situations.

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What Does "Formal and Informal Language" Mean?

Most languages have different forms depending on the situation — polite/professional vs. casual/friendly.

• Formal English → used in education, professional communication, business, and serious matters.

• Informal English → used with friends, casual conversations, or relaxed situations.

In IELTS Academic, you’ll need to demonstrate a strong command of formal English. In IELTS General Training, formal English is essential for certain tasks, while informal or semi-formal language may be appropriate in others.

However, it's important to remember that simply using formal words doesn't guarantee a high score on the IELTS test. It's equally important to use them correctly and in the right context to effectively express your ideas.

Why Formal English Matters in IELTS

Formal language shows examiners you can communicate effectively in professional and academic contexts. Overusing informal terms like “so” or “also” in writing may suggest a lack of awareness of academic conventions.

Examples:

• Formal: “Consequently,” “Furthermore,” “Nevertheless”

• Informal: “So,” “Also,” “Anyway”

But remember — using only formal words won’t guarantee a high score. Correct usage and context matter more.

Examples – Formal vs. Informal Words

When to Use Formal vs. Informal Language in IELTS

IELTS Writing Section:

1. Academic Test:

• Task 1 → Always formal

• Task 2 → Always formal

2. General Training:

• Task 1 → Can be formal, semi-formal, or informal (based on the prompt)

• Task 2 → Always formal

IELTS Speaking Section:

• Speaking tasks are naturally more conversational, so informal language is often fine — but avoid slang or overly casual phrases that could sound unprofessional.

Tips for Writing Formally in IELTS

1. Use precise vocabulary that clearly expresses meaning.

2. Avoid slang, idioms, and overly casual expressions.

3. Follow standard grammar rules.

4. Don’t force rare or complex words you don’t fully understand.

5. Check that every term fits the context of your sentence.

Common Mistakes to Avoid

• Using informal connectors (“and then,” “by the way”) in academic writing.

• Forcing overly complex words to “sound formal.”

• Mixing formal and informal tones within the same task.

Whether you’re aiming for IELTS Academic or General Training, knowing when to use formal vs. informal language can significantly improve your score.

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