Biến đổi các câu sau sang phủ định, nghi vấn và trả lời các câu hỏi nghi vấn đó

Exercise 1: Biến đổi các câu sau sang phủ định, nghi vấn và trả lời các câu hỏi nghi vấn đó

1.     He was planting trees in the garden at 4 pm yesterday.

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2.     They were working when she came yesterday.

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? ............................................................................

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3.     She was painting a picture while her mother was making a cake.

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? ............................................................................

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4.     Anne was riding her bike to school when Peter saw her yesterday.

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?- ............................................................................

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5.     He was typing a letter when his boss went into the room.

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? ............................................................................

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