TOEFL Build a Sentence

What the task is

You are shown a short exchange between two speakers. The first turn is complete; the second has blanks in it, and a set of words and phrases arrives in the wrong order. You arrange them so the second turn is both grammatically correct and sensible as a reply.

Each question has between three and seven blanks, and there are about ten questions, making this the largest block in the Writing section by count. Some questions include an extra fragment that belongs in none of the blanks, so a leftover piece is not evidence that you have gone wrong.

Scoring is binary. A sentence is right or it is wrong, and there is no credit for an arrangement that is almost correct.

What it actually tests

Two things at once, which is what makes it harder than a straightforward grammar exercise. The arrangement has to be syntactically legal, and it has to make sense as a reply to what the first speaker said.

Those constraints can come apart. With most fragment sets there is more than one grammatical arrangement, and only one of them is a sensible response in context. A test taker who solves it as a pure word-order puzzle, without reading the first turn properly, will sometimes produce a perfectly grammatical sentence that answers nothing.

• Sentence-level grammar: clause order, agreement, complementation.
• Knowing which structures a particular verb or adjective allows.
• Reading context well enough to know what the reply must do.

A worked example

An item in the task's format, written for this guide.

«Speaker A: Did you manage to get into the seminar you wanted? / Speaker B: No, ___ ___ ___ ___ ___ by the time I registered.»

Fragments, out of order: «had already been» · «all the places» · «taken» · «unfortunately» · «were filled»

Five fragments, five blanks, but two of them cannot both be used, which is the first thing to notice.

A reliable order of operations

Read the first speaker's turn before you touch the fragments. It fixes the meaning, the tense, and often the polarity of the reply, and every one of those constrains the arrangement.

Then build from the verb outward. Identifying the finite verb group tells you what subject it needs and what can follow it, and most fragment sets collapse quickly once the verb is placed.

Finish by reading the whole exchange back. This is the step that catches the grammatical-but-irrelevant arrangement, and given the all-or-nothing scoring it is the highest-value ten seconds on the task.

• Read speaker A's turn first.
• Find the finite verb group and place it.
• Attach the subject, then the remaining pieces.
• Identify any spare fragment deliberately rather than by elimination panic.
• Read the exchange back as a conversation before moving on.

Common mistakes

• Solving it as a word puzzle without reading the first speaker's turn.
• Assuming every fragment must be used, and forcing the spare in.
• Producing a grammatical sentence that does not answer what was asked.
• Getting the tense wrong because the time reference sits in the other speaker's turn.
• Not checking, on a task where a single misplaced piece costs the whole mark.

How to build the skill

The underlying ability is structural, and reading builds it faster than drilling does. When you meet a long sentence you have to re-read, stop and work out its skeleton: what the main verb is, and what depends on what. That is the same operation this task asks for, performed in reverse.

For targeted practice, take any complex sentence from something you are reading, break it into four or five chunks, shuffle them, and rebuild it a day later. Making the exercise teaches you as much as doing it.

In review, distinguish the two failure modes. Not knowing the structure is a grammar gap and needs study; knowing it but misreading the context is an attention problem and needs the read-back habit.