What form or principle part of the boldface verb is used?

a present
b present participle*******
c past
d past participle

Yes, present particlple. You can tell because of the -ing ending

You're welcome.

oops I forgot to post the question

What boldface verb?

Everyone is LEAVING Sarajevo

Leaving is the boldface verb

thanks

I thought the boldface verb was IS LEAVING. Does it make a difference?

To determine the form or principle part of a verb that is in bold, you need to consider its tense and function in the sentence.

a) "Present" is the base form of the verb and is used for present simple tense, as in "I walk to school."
b) "Present participle" is formed by adding "-ing" to the base form of the verb and is used for present continuous tense, as in "I am walking to school."
c) "Past" is used for past simple tense, as in "I walked to school."
d) "Past participle" is the form that is used in the present perfect tense and the past perfect tense, and it is formed by adding "-ed," "-d," "-t," "-en," or other irregular endings to the base form of the verb, as in "I have walked to school" or "I had walked to school."

In this case, the correct answer would be "b) present participle," as it represents the -ing form of the verb.

thank you, stupid write teacher,