Question

correct the parallelism mistakes of the sentences(a.) My favorite activities are to dance ,skiing,riding my bike.(b.)To get to the doctor's office ,you follow the highway to red lake Bridge,turning at the ice cream shop,and take stewart Road to the very end.

Answer 1

In a) there is a shift from the infinitive--to dance--to the continuous--skiing, riding. The most idiomatic way to write this in English is with the continuous:

My favorite activities are dancing, skiing, and riding my bike.

Sometimes writers will drop the comma after 'skiing'; this comma is called the Oxford comma and most careful writers leave it in.

b) is the opposite. Here use the conjugated and not the continuous:

To get to the doctor's office, you follow the highway to red lake Bridge, turn at the ice cream shop, and take Stewart Road to the very end.