Phủ định: He was not planting trees in the garden at 4 pm yesterday.
Câu hỏi: Was he planting trees in the garden at 4 pm yesterday?
Trả lời câu hỏi: No, he wasn't planting trees in the garden at 4 pm yesterday.

Phủ định: She was not painting a picture while her mother was making a cake.
Câu hỏi: Was she painting a picture while her mother was making a cake?
Trả lời câu hỏi: No, she wasn't painting a picture while her mother was making a cake.

Phủ định: Anne was not riding her bike to school when Peter saw her yesterday.
Câu hỏi: Was Anne riding her bike to school when Peter saw her yesterday?
Trả lời câu hỏi: No, Anne wasn't riding her bike to school when Peter saw her yesterday.

Phủ định: He was not typing a letter when his boss went into the room.
Câu hỏi: Was he typing a letter when his boss went into the room?
Trả lời câu hỏi: No, he wasn't typing a letter when his boss went into the room.