Negative:
1- Mary doesn't sing a song every week.
2- It doesn't snow every winter.
3- They didn't write an e-mail every week.
4- We don't go to the cinema every summer.
5- Tom doesn't usually take a picture
Interogative
1- Does Mary sing a song every week?
2- Does it snow every winter?
3- Did they write an e-mail every week?
4- Do we go to the cinema every summer?
5- Does Tom usually take a picture?