Verb

A verb expresses an action or what is or seems to be. Every sentence must have a verb. 

• The lion roared loudly
• Seema is a wonderful cook.
• Sam read two books last week.
• Shania exercises every day.
• Those apples look delicious.

A verb sometimes expresses an action that cannot be seen or heard.

e.g.

• Susan guessed the answer.
• Eric often dreams of traveling.
• I miss my sister.
• Everyone on the team wished for a home run.
• Mr. Waltz thought about the problem.

An action verb expresses a physical or mental action.

e.g.

• My dad never judges other people.
• We swim in the lake each summer.
• The committee considered the plan with care.
• These birds fly south in the winter.
• The weather bureau predicts rain for tomorrow.

A linking verb expresses what is or what seems to be. It links the subject of the sentence with a word that describes it. 

Be is the most common linking verb. Forms of be are am, is, are, was, and we're.

Other common linking verbs: act, appear, become, feel, grow, look, remain, seem, smell, sound, stay, taste.

e.g.

• Sadat is our friend. (Our friend describes the subject, Sadat)
• Ram always looks happy. (Happy describes how Ram looks.)
• Sarah is a fine actress.
• The cauliflower tastes yummy.
• Linda appears sad.