Convert the following sentences to the present continuous tense: 9. They dog barks. 10. She combs her hair.

Here are the sentences changed into the present continuous tense, following the requested format:

9. They dog barks.

   • Assumption: The sentence is grammatically incorrect as written. Assuming the intended sentence was "The dog barks", the present continuous form is:
     • Answer: $\boxed{\text{The dog is barking.}}$

10. She combs her hair.

    • Answer: $\boxed{\text{She is combing her hair.}}$