Do you still observe vs Do you still observing

Some examples from the web:

• Apparently there's a circle of standing stones on a hill just outside the village, and there's a local group who still observe rituals there.
• The Commission also still observes cases of discrimination on the basis of the place of residence of the passenger.
• Nevertheless, they still have to observe the law.
• I abstained, however, from voting on the legislative resolution, because I believe it is still necessary closely to observe the follow-up given to this report in the legislative process.
• Only if you've known unhappiness... do you still have hope.
• Do you still practice recovered memory?
• Do you still think I'm electable?
• Ms. Boykin, do you still work for...
• Do you still believe Naomi leaked?
• Do you still not understand your wrongdoing?
• Do you still have any powers?
• Do you still favor that idea?
• Why do you still believe Emerald City will work?
• Do you still stand behind the project?
• Do you still have a boyfriend?
• What else do you still share?
• Do you still keep records of your employees?
• Do you still want that presentation later?
• Do you still believe that to be true?
• Do you still want the wheels made?

Some examples from the web:

• The budget that MEPs are proposing for 2004 seeks to provide sufficient funding for enlargement and the EU's external policy commitments while still observing the principles of sound financial management.
• There is a second cartel, within the European market itself, Commissioner; your fellow Commissioner responsible for Competition is still observing it without interfering.
• Only if you've known unhappiness... do you still have hope.
• Do you still practice recovered memory?
• Do you still think I'm electable?
• Ms. Boykin, do you still work for...
• Do you still believe Naomi leaked?
• Do you still not understand your wrongdoing?
• Do you still have any powers?
• Do you still favor that idea?
• Why do you still believe Emerald City will work?
• Do you still stand behind the project?
• Do you still have a boyfriend?
• What else do you still share?
• Do you still keep records of your employees?
• Do you still want that presentation later?
• Do you still believe that to be true?
• Do you still want the wheels made?
• And now do you still have her memories?
• Do you still love uncle David?