This unit is ≈22% of the TOEFL iBT, across 6 lessons. Full syllabus
Lesson 2 of 6 · Writing: Build a Sentence, Write an Email and Write for an Academic Discussion (25%)
Build a Sentence: clauses and complex structures
7 min read · about 1 h 5 min with practice3 quick checks≈4% of the testStretch: Stretch: harder material that separates the top gradesAI-generated · reviewed
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Build a Sentence is only one part of the Writing section, but it gives you 10 fast raw points, so strong control of complex grammar can lift your writing band quickly. On the updated TOEFL iBT, the harder items test whether you can order chunks into a natural reply with the correct clause structure, verb phrase, and meaning in about 35–40 seconds.
By the end you’ll be able to
Find the subject and main verb of the target sentence before placing modifiers, including long subjects with relative clauses (The tour guides who showed us around the old city were…)
Build relative, noun and adverbial clauses with the correct connector (who, which, that, whose, whether, because, although, so that)
Order passive, perfect and continuous verb phrases and modal perfects (has been renovated, should have been told)
Order comparatives, superlatives, quantifiers and noun phrases with several modifiers (the most affordable of the three options, a few more minutes)
Finish 10 items in about 6 minutes, checking subject–verb agreement and tense in each completed sentence
What the exam asks
In Build a Sentence, you see a short exchange. Speaker A asks or says something, and Speaker B’s reply has fixed words plus blank spaces. You must drag the chunks into the only grammatical, context-appropriate order.
For this syllabus point, the harder items usually involve:
a long subject with a relative clause
a noun, relative, or adverbial clause
a passive, perfect, continuous, or modal perfect verb phrase
a comparative or superlative expression
a heavy noun phrase with several modifiers
You get 10 items in about 6 minutes total, so you cannot build the sentence word by word by trial and error. The key cue is the subject and main verb of the reply.
Core ideas
Start with the frame: subject + main verb
Always read the whole prompt first:
Speaker A’s sentence
the fixed words before the blanks
the fixed words after the blanks
Then find the main clause of Speaker B’s reply.
A fast model is:
reply=subject+
vii.Check your understanding
3 questions on build a Sentence: clauses and complex structures. Every option is explained once you answer.
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