Many adverbs are made from an adjective + -ly:

Adjective: Quick serious careful quiet heavy
Abverb: Quickly seriously carefully quietly heavily

Adjective: Fluent special continuos frequent happy
Abverb: Fluently specially continuosly frequently happily

Adjective: nervous perfect bad complete successful
Abverb: nervously perfectly badly completely successfully

Examples:
The driver of the car was seriously injured in the accident.
Our holiday was too short. The time went very quickly.
Not all words ending in –ly are adverbs. Some adjectives end in –ly,for example:
Lovely lonely lively silly friendly elderly
Compare the adverbs and the adjectives in the sentence below:

Adjective + noun
Linking verb + adjective (especially be)
Tom is a careful driver.
We didn’t go out because the heavy rain.

Please be quiet.
I as disappointed that the exam result was so bad.
Why do you look so serious?

She speaks perfect Englih.
Adjective+noun
Compare:
Tom looked sad when I saw him.
Ordinary verb + adverb
Be + adverb + adjective
Tom drove carefully a long the road.
We didn’ go out because it was raining heavily.
Please speak quietly.
I was disappointed that I did so badly in the exam.
Why do you take me seriously?

She speaks English perfectly.
Verb+object+adverb

Tom looked at me sadly.


We also use adverbs before adjectives and other adverbs. For example:
Resonably cheap (adverb + adjective)
Terribly sorry (adverb + adjective)(very)
Incredibly quickly (adverb + adverb)
Examples:
It’s a reasonably cheap restaurant and the food is extremely good.
Tom learns language incredibly quickly.
The examination was surprisingly easy.
I’m terribly sorry. I didn’t mean to push you.
We can also use an adverb before a past participle (injured,organised,written…)
Two people were seriously injured in the accident.
The meeting was very badly organised.
Note:-Incredibly: unbelievably

ĐỘNG TỪ LIÊN KẾT- LINKING VERBS
{Liên động từ (linking verb).}
C
ó một nhóm các động từ đặc biệt có chức năng nối giữa chủ ngữ và vị ngữ tính từ. Không giống các động từ khác, chúng không thể hiện hành động. Do vậy chúng được bổ nghĩa bởi tính từ chứ không phải phó từ. Người ta gọi chúng là liên động từ (linking verbs). Đó là những động từ ở bảng sau:
be appear feel become seem look remain sound smell stay taste
Linking Verbs còn được biết đến đơn giản như là các động từ chỉ nhận thức tri giác bổ nghĩa trực tiếp cho chủ ngữ, theo sau luôn là 1 tính từ.
Linking verbs Examples
Be Ex: She is happy
Alice is now a worker
Become They become sad when the news comes
He is determined to become a professor
Children become tired quite easily.
They were sorry to see us leave.
Remain He remains loyal to his boss even when the company goes into bankruptcy
There remains a big church right in the middle of the village
Stay We stay healthier when we eat more vegetables
Appear She appeared sad at hearing that her father passed away
Seem Nobody seems satisfied with his current job
Sound That sounds a good idea
It sounds terrible
Feel All of us feel distressed when we are sacked unreasonably
Mary feels bad about her test grade.

Look He looked angry than ever once he knew his child committed crime
Lucy looks radiant in her new dress.
Smell The cat smelt odorous after it swam in a dirty lake
The soup tastes good.
The flowers smell sweet.
The flowers she bought yesterday smell fragrant
Taste His food tastes fabulous
The soup tastes good.
Grow The weather grows colder and colder everyday
Turn She turned sicker because of hard work for the whole month
Get They get indignant at realizing that he is a robber
Liên từ có các tính chất:
• Không diễn đạt hành động mà diễn đạt trạng thái hoặc bản chất sự việc.
• Đằng sau chúng phải là tính từ chứ không phải là phó từ.
• Không được chia ở thể tiếp diễn dù dưới bất cứ thời nào.
Be, become, remain còn có thể đứng trước một cụm danh từ chứ không chỉ tính từ:
They remained sad even though I tried to cheer them up. (adjective)
He remained chairman of the board despite the opposition. (noun)
Children often become bored at the meetings. (adjective)
She become class president after