Different parts of speech make different complete sentences.

Please look at the meaning and usage of these two words.

extra

English? 【ekstr？ ] ?

Beautiful? 【ekstr？ ]

extra

Extra things; extra

special

Used as an adjective

The company has added so many people? Extra? A bus.

There were too many people, so the company added more buses.

Guests in this hotel can use the gym. Extra? Cost.

Guests in this hotel can use the gym for free.

Used as a noun

Her tuition is 440 pounds per semester; What is music and dance? Extras.

Her tuition is 440 pounds per semester, and music and dance classes are extra.

How many do we need? Extras? For the battle scene.

We need hundreds of extras to shoot the battle scenes.

Used as an adverb

We'll give you one. Extra? Special discount on the purchase of this commodity.

If you buy these goods, we will give you a very special discount.

expand

English? [? k'stend]？

Beautiful? [? k'stend]

Adjective:? Extensible?

Noun:? Scalability?

Past tense: expansion?

Past participle:? Extension?

Present participle: extension?

Third person singular:? extend

Verb (abbreviation of verb) extension; Extension; Stretching; Expansion; Provide; try one's best

Used as a verb

Our playground? Extension? As for the trees.

Our playground extends all the way to those Woods.

Theoretically, a line can? Extension? Infinite extension.

Theoretically, a straight line can extend indefinitely.

How about it? Extension? What if the visa expires?

How to extend the visa after it expires?

Dry cleaning cans? Extension? The life of your clothes.

Dry cleaning can prolong the service life of clothes.

Hot weather? Extension? Enter October.

The hot weather lasted until October.

Did anyone ask him to do this? Extension? Do warm-up exercises before doing any exercise.

He was told to stretch his limbs before doing any work.

They're going to? Extension? Their research in this field.

They plan to expand their research in this field.

The bank has promised? Extension? Your credit.

The bank promised to provide you with a credit loan.

Me? Extension? I sincerely thank you for your help.

I express my heartfelt thanks for your help.

Does Jim really need it? Extension? He is taking the exam himself.

Jim needn't have worked so hard in this exam.