What I do every week

If you want to to say that somebody does not do something, you must use "to do":
Wenn du sagen möchtest, das jemand etwas nicht tut, dann musst du "to do" verwenden:

positive statement:	They	go	to town.
negative statement:	They	don't go	to town.

^{("don't" is short for "do not")}

3rd person singular:

positive statement:	She	goes	to town.
negative statement:	She	doesn't go	to town.

^{("doesn't" is short for "does not")}

In English you always need an auxiliary verb for the "not". Never add the "not" to the main verb!
Im Englischen braucht man immer ein Hilfsverb für die Verneinung. Du darfst nie das "not" an das Hauptverb hängen!