A present progressive verb is made up of two parts: a form of the present tense of the verb "to be" and the present participle of an action verb. An action verb is a verb that denotes action by the subject. The action can be physical or mental.
To form the progressive tense, use a form of the verb "to be." The form depends upon the subject of the sentence.
First person singular: I am
Second person singular: You are
Third person singular: He is
First person plural: We are
Second person plural: You are
Third person plural: They are
A present participle is an action verb with "-ing" added to the end. For example, the present participle of the action verb "walk" would be "walking." Many verbs change spelling when "-ing" is added.
For verbs made up of consonant-vowel-consonant format, double the consonant before adding "-ing," as in "hopping."
For verbs that end in silent "e," drop the "e" before adding "-ing," as in "hiring."
For verbs that end in the vowel digraph "ie," change the "ie" to "y" before adding "-ing," as in "tying."
The present participle of a verb is the same, regardless of the subject.
First person singular: "I am walking."
Second person singular: "You are walking."
Third person singular: "She is walking."
First person plural: "We are walking."
Third person plural: "They are walking."
Question: "Is she walking to work?"
Tenses such as the past progressive, future progressive and present perfect progressive use the present participle, but the form of the verb "to be" is not in the present. An example the past progressive, "I was walking."