TOEFL Grammar Quiz

Ace the TOEFL grammar section with free practice quizzes. Test academic grammar structures, complex sentences and formal English usage.

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Sample Questions

1. Choose the sentence correctly describing researchers repeating an experiment, using simple past passive.

A The experiment replicated three times to ensure accuracy.

B The experiment was replicated three times to ensure accuracy.

C The experiment has replicated three times to ensure accuracy.

D The experiment was replicating three times to ensure accuracy.

2. Which is correct? 'The study was conducted ___ established ethical guidelines.'

A according

B in line

C in accordance with

D in accordance

3. Use simple past: 'The sample size ___ sufficient to detect meaningful differences.'

A was

B were

C had been

D has been

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