1. Why does Helen speak French so well? Where does Helen live? Helen doesn't speak French so well.
2. When did she live there? Where did she live last year? She didn't live there last year.
3. What has bought Mary? Who has bought a new hat? Mary hasn't bought a new hat yesterday.
4. What did you buy yesterday? When did you buy pair of gloves? I didn't buy a pair of gloves yesterday.
5. Why we can go for a walk? Has the weather changed? The weather hasn't changed and we can't go for a walk.