what is the difference between an "evaluation " and an "analysis" of a concept.help me with examples.

Here's the general idea.

an evaluation - Decides the value of something. eg Tells you if something is good or bad, useful or not useful, valid or invalid.

an analysis - Finds out the parts of something, eg its elements, structure, processes.

Typically, you need to do an analysis before you can do an evaluation.

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To expand on this better...

...an analysis infers the meaning or purpose of something; it makes an interpretation. However, an evaluation makes a judgment about the quality of something, such as an argument or decision.

For example, if someone uses formal language to express an idea or belief, I can analyze (e.g., infer or interpret) the purpose of such language as functioning to enhance that person's credibility. In doing so, I provide no judgment about the quality of the language; I simply am making an interpretation of why such language is used or how it contributes to an overall meaning. An analysis is more objective than subjective.

On the other hand, if I were to judge whether such language actually does enhance the credibility of that person, then I am making an evaluation--I'm making a purely subjective statement that rates instead of describes. I'm not simply addressing the function of something, but rather the quality of something.

That is a FINE and succinct explaination!
This rambly and incorrect. At least I think it is.
Students: Are you brave enough to let our tutors analyse your pronunciation?
You first analyse and see if there is anything to evaluate from a text.