Let's look at the difference between ready and prepare!
One: the difference between state and action
"ready" is an adjective used to describe that someone or something is ready for immediate action or use. "prepare" is a verb, which means to prepare or arrange for something, and emphasizes to prepare for future events or actions.
Example:
I'm ready to go. Let's leave now. ?
I was ready for this. Let's start now.
I need to prepare my presentation for tomorrow's meeting. ?
I need to prepare my presentation for tomorrow's meeting.
Two: the difference between active and passive
"Ready" emphasizes the subjective state of readiness, which means that an individual or an object is ready. "Preparation" emphasizes subjective actions and refers to specific actions or arrangements made by individuals or objects in the preparation process.
Example:
After studying all night, she got ready for the exam. ?
She studied all night to prepare for the exam.
They are preparing the venue for the meeting. ?
They are preparing the venue for the meeting.
Three: differences in grammatical usage
"ready" is an adjective and can be directly used as a modifier with nouns or pronouns. "prepare" is a verb, usually followed by an object (-ing of a noun, pronoun or verb), which means to prepare for something.
Example:
We need to prepare for the party tonight. ?
We need to prepare for the party tonight.
He prepared a delicious meal for the guests. ?
He prepared delicious meals for his guests.