Ответ:
1.
Sometimes Mike goes to school by bus. (+)
Does Mike sometimes go to school by bus? (?)
Sometimes Mike doesn't go to school by bus. (-)
2.
Jane goes to the theatre every week. (+)
Does Jane go to the theatre every week? (?)
Jane doesn't go to the theatre every week. (-)
3.
Helen is seldom late for work. (+)
Is Helen seldom late for work? (?)
Helen isn't seldom late for work. (-)
4.
Henry often drinks tea for breakfast. (+)
Does Henry often drink tea for breakfast? (?)
Henry doesn't often drink tea for breakfast. (-)
5.
They usually visit their grandparents on Sunday. (+)
Do they usually visit their grandparents on Sunday? (?)
They don't usually visit their grandparents on Sunday. (-)