These words all mean "fast" or "swift", but there are some differences in usage. Quickly is generally used to describe a task or action and express the speed of doing things; Fast is more used to describe the speed of an object or movement; Agile has a similar meaning, but it is more used in literature or poetry; Emphasize the rapid occurrence of events or processes.
Example:
She finished her homework quickly and went out to play. She finished her homework quickly and went out to play. )
The car was driving too fast, so he had to slow down. The car was driving too fast, so he had to slow down. )
Birds fly across the sky. Birds fly fast in the sky. )
-The virus is spreading rapidly, and we need to take action now. The virus spreads very fast, so we need to take action at once. )
2. Slowly/lazily/listlessly/lazily
These words all mean "slowly" or "slowly", but their usage and meaning are different. Slow is the most commonly used word, indicating a slow and conscious speed; Laziness means lack of motivation and willpower, laziness; Lethargic emphasis on mental and physical slowness; Slightly means very slow, even a little difficult.
Example:
He walked slowly and carefully, trying not to make any noise. He walked slowly and carefully, trying not to make any noise. )
She lay lazily in the sun, enjoying the warmth. She lies lazily in the sun, enjoying the warmth. )
After working all day, he is slow and has no strength. After working all day, he looks lazy and listless. )
The old car moved slowly up the hill, trying to keep up with the traffic. The old car climbed slowly up the hill, trying to keep up with the traffic. )
3. Gently/gently/gently/tenderly
These words all mean "softness" or "tenderness", but their usage is also different. Both Gentle and softly emphasize the feeling of softness and gentleness, but Gentle describes action more and softly describes sound more. Gentle means a slight or gentle feeling; Gently emphasize the feeling of tenderness and care.
Example:
She touched his face gently, trying not to wake him. She touched his face gently, trying not to wake him. )
She spoke softly so as not to disturb the sleeping baby. )
This medicine is mild and has not caused any side effects. This medicine is mild and effective without any side effects. )
He held her tenderly in his arms and whispered in her ear. He hugged her gently and spoke softly to her. )
4. Be careful/careful/careful/cautious
These words all mean "caution" or "caution", but they are also used in different ways. Caution emphasizes caution, but caution is more used to describe action and caution is more used to describe attitude; Vigilantly emphasize vigilance and vigilance; Caution means being organized and planned.
Example:
He examined the documents carefully before signing the contract. )
She walked carefully across the icy sidewalk, afraid of slipping. She crossed the icy sidewalk carefully for fear of slipping. )
The old lady looked at the stranger, unsure of his intentions. The old lady looks at the stranger warily, unsure of his intentions. )
He carefully invested his money in seven different stocks to minimize the risk. He plans to invest his money in several different stocks to minimize risks. )
The above are common adverbs with similar word forms and meanings, as well as their usage and differences. I hope they can help you with your study.