把所给句子变成否定句,就划线部分提问
问题描述：
把所给句子变成否定句,就划线部分提问
1.They go on a picnic next （weekend划线部分）.
2.I return to Shenzhen（ by train划线部分） next Sunday.
答
否定句：
1.Theydon't go on a picnic next week .
2.I don't return to Shenzhen by train next Sunday .
提问
1.When do they go on a picnic?
2.How do youreturn to Shenzhen next Sunday ?