TOEFL Writing Vocabulary for the 2026 Test

The current TOEFL Writing section contains three different language problems. Build a Sentence tests whether words fit together grammatically. Write an Email requires a clear purpose and next action. Write for an Academic Discussion asks you to state and support a position while responding to an ongoing exchange.

A single list of “advanced words” does not prepare you for all three. A word can be appropriate in an academic discussion yet stiff in an email. A useful idea can still fail in Build a Sentence if its preposition, clause pattern, or word order is wrong.

Explore the full route in the TOEFL vocabulary practice hub and the shared Exam English hub.

Three tasks, three kinds of control

Build a Sentence: learn the whole frame

Do not store depend alone. Store depend on + noun and depend on whether + clause.

Whether the workshop proceeds depends on whether enough students register.

The outcome depends on a condition. Reversing the clauses changes the logic.

Other useful frames include:

• enable + person + to + verb;
• prevent + person/thing + from + gerund;
• require + noun or require + person + to + verb;
• contribute to + noun/gerund;
• be responsible for + noun/gerund.

Near words do not always share grammar. Allow takes person + to; enable normally does too. Let takes an object plus the base verb without to. Vocabulary knowledge includes that structure.

Write an Email: separate request, condition, and commitment

Compare these sentences:

Please change the deadline.

Would it be possible to move the deadline to Thursday? I can submit the revised data table by noon that day.

The second version names the requested change and a concrete commitment. It is polite without hiding the purpose.

Use confirm when you need verification, clarify when something is unclear, and notify when the main act is giving information.

• “Could you confirm whether the room is available?”
• “Could you clarify which version we should submit?”
• “I am writing to notify you that the delivery will arrive on Friday.”

Do not use confirm when nobody has made a prior claim or arrangement to verify. Do not use clarify as a decorative substitute for explain; it responds to ambiguity.

Academic Discussion: state, connect, limit

A useful response does more than announce agreement.

I agree with Mina that recorded lectures improve access. Her example shows how recordings help students review difficult material. However, it does not establish that recordings should replace live discussion. A mixed format may preserve access while keeping immediate questions possible.

The vocabulary performs four jobs:

• agree states the relationship to another post;
• shows describes what the example supports;
• does not establish limits the claim;
• may preserve presents a measured proposal.

Distinguish suggest, show, and prove. Suggest supports a possible interpretation. Show can state that evidence makes a point visible, but its strength still depends on context. Prove is much stronger and is rarely justified by one classroom example.

Distinguish concede from agree. To concede is to accept a point that limits or complicates your own position.

I concede that the equipment is expensive; nonetheless, shared access could make the program feasible.

The writer retains the main proposal while accepting a real limitation.

One idea across all three tasks

Core idea: students learn more when they receive feedback early.

Build a Sentence:

Early feedback enables students to correct errors before those errors become habits.

Write an Email:

Would it be possible to receive feedback on the outline by Tuesday? I would then have two days to revise the final report.

Academic Discussion:

Early feedback can improve learning because it exposes a mistaken approach before a student repeats it. However, the feedback must be specific enough to guide a revision.

The concept remains stable. The language changes with the action required by the task.

Quick check

1. Complete the frame: “The result depends ___ whether the sample is representative.”
2. You need to know which of two files is required. Should you ask someone to confirm or clarify?
3. One example supports a possible explanation. Choose suggests or proves.
4. You accept a cost problem but maintain your recommendation. Choose concede or withdraw.

Answers: 1. on. 2. Clarify which file; confirm works if you are checking an understood choice. 3. Suggests. 4. Concede.

For practice, take one idea and express it in all three task shapes. Check grammar first, task action second, and word precision third. A rare word cannot rescue a sentence whose relationship is unclear.

Worked set: one campus problem, three outputs

Use this fictional fact set: a study room is reserved for Wednesday afternoon; construction noise has been announced for that period; the library has a smaller quiet room available on Thursday morning; a group presentation is due Friday.

Build a Sentence

Fragments: the group / whether / depends on / can change / room availability / its meeting /.

One grammatical result is:

Whether the group can change its meeting depends on room availability.

The whether clause acts as the subject. Depends on must remain intact, and room availability is the condition. “Room availability depends on whether the group can change” reverses the relationship.

Write an Email

Subject: Request to move Wednesday's study-room booking

Hello Ms. Patel,

I am writing because construction noise has been announced during our Wednesday booking. Could you confirm whether the smaller quiet room is available on Thursday morning? Moving the session would still leave us a day to finalize Friday's presentation. If Thursday is unavailable, we will keep the original booking and bring headphones.

Thank you, Lena

The message separates the reason, request, constraint, and fallback. Confirm whether asks for verification. Still leave us a day explains feasibility. The fallback prevents the request from sounding as though only one outcome is acceptable.

Academic Discussion

Prompt idea: should universities prioritize more individual study rooms or larger shared rooms?

I would prioritize a mix rather than one room type. Larger rooms make group work possible, as Noah notes, but they do not meet every study need. Individual rooms are particularly useful for recorded interviews or focused reading. A mixed allocation would therefore serve a wider range of tasks, provided that booking rules prevent a few users from occupying the small rooms all day.

Prioritize means give greater importance, not guarantee unlimited supply. Provided that introduces a condition. The response engages another view, adds a distinct reason, and limits the proposal.

Editing ladder

Edit a response in this order:

1. Task completion: Is the requested sentence, email action, or discussion position present?
2. Relationship: Are cause, contrast, condition, and sequence accurate?
3. Grammar frame: Are complementation and prepositions complete?
4. Claim strength: Do modals and degree words match the evidence?
5. Range: Can one repeated word be replaced without changing the claim?

Range comes last because variety is useful only after meaning is stable. If help appears three times, do not blindly substitute facilitate, enable, and support. Ask what each instance means. A policy may enable students to book a room, support collaborative work, or help reduce scheduling conflicts. The context licenses the choice.

Additional check

Correct the problem in each line.

1. “The deadline depends whether the data arrive.”
2. “Could you clarify me the room number?”
3. “One student example proves that the policy always works.”
4. “I concede with Maya that cost is a concern.”

Answers: 1. depends on whether. 2. Could you clarify the room number for me? or Could you tell me...? 3. suggests or illustrates, with a narrower claim. 4. I agree with Maya...; use concede that cost is a concern when the point limits your own position.

Sources

• TOEFL iBT test content
• TOEFL iBT Writing section

Related

• TOEFL Build a Sentence: collocations that fit
• TOEFL Write an Email vocabulary
• TOEFL Academic Discussion vocabulary
• TOEFL Writing rubric and appropriate word choice

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