السؤال 83

Which question contains an agreement error because the auxiliary fails to agree with its following subject?

Why does the central heating stop at noon?
Where does the buses from the airport stop?الإجابة الصحيحة
When do the evening classes usually finish?
How does the new booking system work?

الشرح

The following grammatical subject buses is plural, so that question needs do rather than does. Heating, classes, and system each receive the auxiliary required by their own singular or plural number.

الشرح

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