Dequeísmo and Queísmo Quiz – C1 Practice
Dequeísmo is adding de before que when no preposition is required — pienso de que instead of pienso que. Queísmo is the opposite: dropping a de that is required — me alegro que instead of me alegro de que. Both are high-frequency errors that even native speakers make, and both are easy to fix once you know the verb patterns. This 48-question C1 quiz drills the two errors, the verb + preposition pairs that cause them, and the question test — ¿Qué…? vs ¿De qué…? — that resolves almost every case. Four sets, instant explanations, and a guide link if you want the full rules first.
