[Grammar] Unit 3 Verbs Post-Test

Sound waves enter our ears.

• An action verb

• A linking verb

They strike the eardrum.

• An action verb

• A linking verb

The eardrum vibrates.

• An action verb

• A linking verb

Signals reach the brain.

• An action verb

• A linking verb

Then we hear sounds.

• An action verb

• A linking verb

Some sounds are too high-pitched to be heard by humans.

• An action verb

• A linking verb

The process of hearing is complicated.

• An action verb

• A linking verb

Sir Francis Galton invented a whistle to call dogs.

• An action verb

• A linking verb

The sound was too high for people to hear.

• An action verb

• A linking verb

Dogs heard it clearly.

• An action verb

• A linking verb