Helping Linking Action Verbs

In the following sentence "must" is what type of verb?
I must go to the store tonight!

• helping
• action
• linking

Linking verbs

• show action

• help the action verb

• link the subject to a predicate adjective or predicate noun

Helping verbs

• show action

• link the subject to a predicate adjective or a predicate noun

• help the action verb

Dirt track racing is exciting!

• linking verb

• helping verb

Jeremy is building his race car now for the 2019 season.

• linking verb

• helping verb

_{Linking verbs LINK the subject to a word that describes it. What is the linking verb in this sentence?}

Kevin is a White Bear Lake firefighter.

• Kevin
• is
• White Bear Lake
• firefighter

_{What type of verb is the word in red?}

In twenty more years, Bob will retire.

• action verb
• linking verb
• helping verb

_{In the following sentence is "are" a helping or a linking verb?}

You are working very hard on this material.

• helping verb
• linking verb

_{What type of verb is the word in red?}

I am so hungry!

• action verb
• helping verb
• linking verb

_{What type of verb is the word in red?}

We should visit my grandmother.

• action verb
• helping verb
• linking verb