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Some examples of auxiliary verbs include:

• She is cooking dinner for us tonight.
• Does he play the ukulele?
• They have finished the assignment.
• He was reading a book during lunchtime.
• I did call you last night.

Modal verbs are placed right before the base form of the main verb in a sentence and help express possibility, ability, or necessity. Note that the main verbs used after the modal verbs do not take '-s', '-es', or '-ing' at the end of the verb.

Examples:

• She can sing beautifully.
• It might rain later today.
• He should apologize for his bad behavior.
• You must complete your work before the deadline.

Some examples of modal verbs include:

• She can solve this puzzle within one minute.
• He may come late to the meeting.
• You must wear a seatbelt while driving.
• I would love to visit South Korea.
• You should study regularly.

Auxiliary Verbs or Primary Helping Verbs are the verbs used with main verbs to express different voices, questions, tenses, and negations in a sentence. These include different forms of Be, Have, and Do, such as is, am, are, be, been, being, do, did, does, was, and were.

The future perfect tense follows a simple structure. To form a sentence using the future perfect tense, we use will + have + past participle of the verb. Look at the following example to understand the rule of future perfect tense better:

• He will have driven 10 miles by 2 PM.
• Sharon will have slept for three hours by the time we reach the beach.
• You will have baked the cupcake by dinner time.